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Data Structures | Macros | Typedefs | Functions
c.h File Reference
#include "pg_config.h"
#include "pg_config_manual.h"
#include "pg_config_os.h"
#include <assert.h>
#include <inttypes.h>
#include <stdalign.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stddef.h>
#include <stdarg.h>
#include <stdint.h>
#include <sys/types.h>
#include <errno.h>
#include <locale.h>
#include "postgres_ext.h"
#include <stdbool.h>
#include "port.h"
Include dependency graph for c.h:
This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Data Structures

struct  varlena
 
struct  int2vector
 
struct  oidvector
 
struct  nameData
 
struct  PGAlignedBlock
 
struct  PGIOAlignedBlock
 
struct  PGAlignedXLogBlock
 
struct  pg_signal_info
 

Macros

#define __has_attribute(attribute)   0
 
#define pg_attribute_unused()
 
#define pg_fallthrough
 
#define pg_nodiscard
 
#define pg_noreturn   _Noreturn
 
#define pg_attribute_no_sanitize_address()
 
#define pg_attribute_no_sanitize_alignment()
 
#define pg_attribute_nonnull(...)
 
#define pg_attribute_target(...)
 
#define PG_USED_FOR_ASSERTS_ONLY   pg_attribute_unused()
 
#define PG_PRINTF_ATTRIBUTE   PG_C_PRINTF_ATTRIBUTE
 
#define pg_attribute_format_arg(a)
 
#define pg_attribute_printf(f, a)
 
#define pg_always_inline   inline
 
#define pg_noinline
 
#define pg_attribute_cold
 
#define pg_attribute_hot
 
#define pg_unreachable()   abort()
 
#define pg_assume(expr)   ((void) 0)
 
#define likely(x)   ((x) != 0)
 
#define unlikely(x)   ((x) != 0)
 
#define CppAsString(identifier)   #identifier
 
#define CppAsString2(x)   CppAsString(x)
 
#define CppConcat(x, y)   x##y
 
#define VA_ARGS_NARGS(...)
 
#define VA_ARGS_NARGS_(_01, _02, _03, _04, _05, _06, _07, _08, _09, _10, _11, _12, _13, _14, _15, _16, _17, _18, _19, _20, _21, _22, _23, _24, _25, _26, _27, _28, _29, _30, _31, _32, _33, _34, _35, _36, _37, _38, _39, _40, _41, _42, _43, _44, _45, _46, _47, _48, _49, _50, _51, _52, _53, _54, _55, _56, _57, _58, _59, _60, _61, _62, _63, N, ...)    (N)
 
#define FLEXIBLE_ARRAY_MEMBER   /* empty */
 
#define INT64CONST(x)   INT64_C(x)
 
#define UINT64CONST(x)   UINT64_C(x)
 
#define INT64_FORMAT   "%" PRId64
 
#define UINT64_FORMAT   "%" PRIu64
 
#define OID8_FORMAT   "%" PRIu64
 
#define PG_INT8_MIN   INT8_MIN
 
#define PG_INT8_MAX   INT8_MAX
 
#define PG_UINT8_MAX   UINT8_MAX
 
#define PG_INT16_MIN   INT16_MIN
 
#define PG_INT16_MAX   INT16_MAX
 
#define PG_UINT16_MAX   UINT16_MAX
 
#define PG_INT32_MIN   INT32_MIN
 
#define PG_INT32_MAX   INT32_MAX
 
#define PG_UINT32_MAX   UINT32_MAX
 
#define PG_INT64_MIN   INT64_MIN
 
#define PG_INT64_MAX   INT64_MAX
 
#define PG_UINT64_MAX   UINT64_MAX
 
#define HAVE_INT64_TIMESTAMP
 
#define FLOAT8PASSBYVAL   true
 
#define InvalidSubTransactionId   ((SubTransactionId) 0)
 
#define TopSubTransactionId   ((SubTransactionId) 1)
 
#define FirstCommandId   ((CommandId) 0)
 
#define InvalidCommandId   (~(CommandId)0)
 
#define InvalidOid8   ((Oid8) 0)
 
#define OID8_MAX   UINT64_MAX
 
#define VARHDRSZ   ((int32) sizeof(int32))
 
#define NameStr(name)   ((name).data)
 
#define BoolIsValid(boolean)   ((boolean) == false || (boolean) == true)
 
#define PointerIsAligned(pointer, type)    (((uintptr_t)(pointer) % (sizeof (type))) == 0)
 
#define OffsetToPointer(base, offset)    ((void *)((char *) base + offset))
 
#define OidIsValid(objectId)   ((bool) ((objectId) != InvalidOid))
 
#define Oid8IsValid(objectId)   ((bool) ((objectId) != InvalidOid8))
 
#define RegProcedureIsValid(p)   OidIsValid(p)
 
#define lengthof(array)   (sizeof (array) / sizeof ((array)[0]))
 
#define TYPEALIGN(ALIGNVAL, LEN)    (((uintptr_t) (LEN) + ((ALIGNVAL) - 1)) & ~((uintptr_t) ((ALIGNVAL) - 1)))
 
#define SHORTALIGN(LEN)   TYPEALIGN(ALIGNOF_SHORT, (LEN))
 
#define INTALIGN(LEN)   TYPEALIGN(ALIGNOF_INT, (LEN))
 
#define INT64ALIGN(LEN)   TYPEALIGN(ALIGNOF_INT64_T, (LEN))
 
#define DOUBLEALIGN(LEN)   TYPEALIGN(ALIGNOF_DOUBLE, (LEN))
 
#define MAXALIGN(LEN)   TYPEALIGN(MAXIMUM_ALIGNOF, (LEN))
 
#define BUFFERALIGN(LEN)   TYPEALIGN(ALIGNOF_BUFFER, (LEN))
 
#define CACHELINEALIGN(LEN)   TYPEALIGN(PG_CACHE_LINE_SIZE, (LEN))
 
#define TYPEALIGN_DOWN(ALIGNVAL, LEN)    (((uintptr_t) (LEN)) & ~((uintptr_t) ((ALIGNVAL) - 1)))
 
#define SHORTALIGN_DOWN(LEN)   TYPEALIGN_DOWN(ALIGNOF_SHORT, (LEN))
 
#define INTALIGN_DOWN(LEN)   TYPEALIGN_DOWN(ALIGNOF_INT, (LEN))
 
#define INT64ALIGN_DOWN(LEN)   TYPEALIGN_DOWN(ALIGNOF_INT64_T, (LEN))
 
#define DOUBLEALIGN_DOWN(LEN)   TYPEALIGN_DOWN(ALIGNOF_DOUBLE, (LEN))
 
#define MAXALIGN_DOWN(LEN)   TYPEALIGN_DOWN(MAXIMUM_ALIGNOF, (LEN))
 
#define BUFFERALIGN_DOWN(LEN)   TYPEALIGN_DOWN(ALIGNOF_BUFFER, (LEN))
 
#define TYPEALIGN64(ALIGNVAL, LEN)    (((uint64) (LEN) + ((ALIGNVAL) - 1)) & ~((uint64) ((ALIGNVAL) - 1)))
 
#define MAXALIGN64(LEN)   TYPEALIGN64(MAXIMUM_ALIGNOF, (LEN))
 
#define Assert(condition)   ((void)true)
 
#define AssertMacro(condition)   ((void)true)
 
#define AssertPointerAlignment(ptr, bndr)    Assert(TYPEALIGN(bndr, (uintptr_t)(ptr)) == (uintptr_t)(ptr))
 
#define StaticAssertDecl(condition, errmessage)    static_assert(condition, errmessage)
 
#define StaticAssertStmt(condition, errmessage)    do { static_assert(condition, errmessage); } while(0)
 
#define StaticAssertExpr(condition, errmessage)    ((void) sizeof(struct {static_assert(condition, errmessage); char a;}))
 
#define StaticAssertVariableIsOfType(varname, typename)
 
#define StaticAssertVariableIsOfTypeMacro(varname, typename)
 
#define Max(x, y)   ((x) > (y) ? (x) : (y))
 
#define Min(x, y)   ((x) < (y) ? (x) : (y))
 
#define SIZE_T_ALIGN_MASK   (sizeof(size_t) - 1)
 
#define MemSet(start, val, len)
 
#define MemSetAligned(start, val, len)
 
#define FLOAT4_FITS_IN_INT16(num)    ((num) >= (float4) PG_INT16_MIN && (num) < -((float4) PG_INT16_MIN))
 
#define FLOAT4_FITS_IN_INT32(num)    ((num) >= (float4) PG_INT32_MIN && (num) < -((float4) PG_INT32_MIN))
 
#define FLOAT4_FITS_IN_INT64(num)    ((num) >= (float4) PG_INT64_MIN && (num) < -((float4) PG_INT64_MIN))
 
#define FLOAT8_FITS_IN_INT16(num)    ((num) >= (float8) PG_INT16_MIN && (num) < -((float8) PG_INT16_MIN))
 
#define FLOAT8_FITS_IN_INT32(num)    ((num) >= (float8) PG_INT32_MIN && (num) < -((float8) PG_INT32_MIN))
 
#define FLOAT8_FITS_IN_INT64(num)    ((num) >= (float8) PG_INT64_MIN && (num) < -((float8) PG_INT64_MIN))
 
#define INVERT_COMPARE_RESULT(var)    ((var) = ((var) < 0) ? 1 : -(var))
 
#define HIGHBIT   (0x80)
 
#define IS_HIGHBIT_SET(ch)   ((unsigned char)(ch) & HIGHBIT)
 
#define SQL_STR_DOUBLE(ch, escape_backslash)    ((ch) == '\'' || ((ch) == '\\' && (escape_backslash)))
 
#define ESCAPE_STRING_SYNTAX   'E'
 
#define STATUS_OK   (0)
 
#define STATUS_ERROR   (-1)
 
#define STATUS_EOF   (-2)
 
#define gettext(x)   (x)
 
#define dgettext(d, x)   (x)
 
#define ngettext(s, p, n)   ((n) == 1 ? (s) : (p))
 
#define dngettext(d, s, p, n)   ((n) == 1 ? (s) : (p))
 
#define _(x)   gettext(x)
 
#define gettext_noop(x)   (x)
 
#define PG_TEXTDOMAIN(domain)   (domain "-" PG_MAJORVERSION)
 
#define unconstify(underlying_type, expr)
 
#define unvolatize(underlying_type, expr)
 
#define PG_BINARY   0
 
#define PG_BINARY_A   "a"
 
#define PG_BINARY_R   "r"
 
#define PG_BINARY_W   "w"
 
#define PGDLLIMPORT
 
#define PGDLLEXPORT
 
#define SIGNAL_ARGS   int postgres_signal_arg, const pg_signal_info *pg_siginfo
 

Typedefs

typedef void(* pg_funcptr_t) (void)
 
typedef void * Pointer
 
typedef int8_t int8
 
typedef int16_t int16
 
typedef int32_t int32
 
typedef int64_t int64
 
typedef uint8_t uint8
 
typedef uint16_t uint16
 
typedef uint32_t uint32
 
typedef uint64_t uint64
 
typedef size_t Size
 
typedef unsigned int Index
 
typedef signed int Offset
 
typedef float float4
 
typedef double float8
 
typedef Oid regproc
 
typedef regproc RegProcedure
 
typedef uint32 TransactionId
 
typedef uint32 LocalTransactionId
 
typedef uint32 SubTransactionId
 
typedef TransactionId MultiXactId
 
typedef uint64 MultiXactOffset
 
typedef uint32 CommandId
 
typedef uint64 Oid8
 
typedef struct varlena varlena
 
typedef varlena bytea
 
typedef varlena text
 
typedef varlena BpChar
 
typedef varlena VarChar
 
typedef struct nameData NameData
 
typedef NameData * Name
 
typedef struct PGAlignedBlock PGAlignedBlock
 
typedef struct PGIOAlignedBlock PGIOAlignedBlock
 
typedef struct PGAlignedXLogBlock PGAlignedXLogBlock
 
typedef struct pg_signal_info pg_signal_info
 
typedef uint16_t char16_t
 
typedef uint32_t char32_t
 

Functions

pg_noreturn void ExceptionalCondition (const char *conditionName, const char *fileName, int lineNumber)
 
int fdatasync (int fd)
 

Macro Definition Documentation

◆ _

#define _ (   x)    gettext(x)

Definition at line 1314 of file c.h.

◆ __has_attribute

#define __has_attribute (   attribute)    0

Definition at line 197 of file c.h.

◆ Assert

#define Assert (   condition)    ((void)true)

Definition at line 1002 of file c.h.

◆ AssertMacro

#define AssertMacro (   condition)    ((void)true)

Definition at line 1003 of file c.h.

◆ AssertPointerAlignment

#define AssertPointerAlignment (   ptr,
  bndr 
)     Assert(TYPEALIGN(bndr, (uintptr_t)(ptr)) == (uintptr_t)(ptr))

Definition at line 1037 of file c.h.

1074 { static_assert(condition, errmessage); } while(0)
1075
1076/*
1077 * StaticAssertExpr() is for use in an expression.
1078 *
1079 * See <https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3715.pdf> for some
1080 * rationale for the precise behavior of this implementation. See
1081 * <https://stackoverflow.com/questions/31311748> about the C++
1082 * implementation.
1083 */
1084#ifndef __cplusplus
1085#define StaticAssertExpr(condition, errmessage) \
1086 ((void) sizeof(struct {static_assert(condition, errmessage); char a;}))
1087#else /* __cplusplus */
1088#define StaticAssertExpr(condition, errmessage) \
1089 ([]{static_assert(condition, errmessage);})
1090#endif
1091
1092
1093/*
1094 * Compile-time checks that a variable (or expression) has the specified type.
1095 *
1096 * The type must not have top-level qualifiers (const, volatile) and must not
1097 * be an array (use pointer instead). (This wouldn't work because _Generic
1098 * does lvalue conversion on the controlling expression, which drops
1099 * qualifiers and converts arrays to pointers.) Qualifiers inside pointers
1100 * are allowed.
1101 *
1102 * StaticAssertVariableIsOfType() can be used as a declaration.
1103 * StaticAssertVariableIsOfTypeMacro() is intended for use in macros, eg
1104 * #define foo(x) (StaticAssertVariableIsOfTypeMacro(x, int), bar(x))
1105 *
1106 * Note that these do not work in C++.
1107 */
1108#define StaticAssertVariableIsOfType(varname, typename) \
1109 StaticAssertDecl(_Generic((varname), typename: 1, default: 0), \
1110 CppAsString(varname) " does not have type " CppAsString(typename))
1111#define StaticAssertVariableIsOfTypeMacro(varname, typename) \
1112 (StaticAssertExpr(_Generic((varname), typename: 1, default: 0), \
1113 CppAsString(varname) " does not have type " CppAsString(typename)))
1114
1115
1116/* ----------------------------------------------------------------
1117 * Section 7: widely useful macros
1118 * ----------------------------------------------------------------
1119 */
1120/*
1121 * Max
1122 * Return the maximum of two numbers.
1123 */
1124#define Max(x, y) ((x) > (y) ? (x) : (y))
1125
1126/*
1127 * Min
1128 * Return the minimum of two numbers.
1129 */
1130#define Min(x, y) ((x) < (y) ? (x) : (y))
1131
1132
1133/* Get a bit mask of the bits set in non-size_t aligned addresses */
1134#define SIZE_T_ALIGN_MASK (sizeof(size_t) - 1)
1135
1136/*
1137 * MemSet
1138 * Exactly the same as standard library function memset(), but considerably
1139 * faster for zeroing small size_t-aligned structures (such as parsetree
1140 * nodes). This has to be a macro because the main point is to avoid
1141 * function-call overhead. However, we have also found that the loop is
1142 * faster than native libc memset() on some platforms, even those with
1143 * assembler memset() functions. More research needs to be done, perhaps
1144 * with MEMSET_LOOP_LIMIT tests in configure.
1145 */
1146#define MemSet(start, val, len) \
1147 do \
1148 { \
1149 /* must be void* because we don't know if it is size_t aligned yet */ \
1150 void *_vstart = (void *) (start); \
1151 int _val = (val); \
1152 Size _len = (len); \
1153\
1154 if ((((uintptr_t) _vstart) & SIZE_T_ALIGN_MASK) == 0 && \
1155 (_len & SIZE_T_ALIGN_MASK) == 0 && \
1156 _val == 0 && \
1157 _len <= MEMSET_LOOP_LIMIT && \
1158 /* \
1159 * If MEMSET_LOOP_LIMIT == 0, optimizer should find \
1160 * the whole "if" false at compile time. \
1161 */ \
1162 MEMSET_LOOP_LIMIT != 0) \
1163 { \
1164 size_t *_start = (size_t *) _vstart; \
1165 size_t *_stop = (size_t *) ((char *) _start + _len); \
1166 while (_start < _stop) \
1167 *_start++ = 0; \
1168 } \
1169 else \
1170 memset(_vstart, _val, _len); \
1171 } while (0)
1172
1173/*
1174 * MemSetAligned is the same as MemSet except it omits the test to see if
1175 * "start" is size_t-aligned. This is okay to use if the caller knows
1176 * a-priori that the pointer is suitably aligned (typically, because he just
1177 * got it from palloc(), which always delivers a max-aligned pointer).
1178 */
1179#define MemSetAligned(start, val, len) \
1180 do \
1181 { \
1182 size_t *_start = (size_t *) (start); \
1183 int _val = (val); \
1184 Size _len = (len); \
1185\
1186 if ((_len & SIZE_T_ALIGN_MASK) == 0 && \
1187 _val == 0 && \
1188 _len <= MEMSET_LOOP_LIMIT && \
1189 MEMSET_LOOP_LIMIT != 0) \
1190 { \
1191 size_t *_stop = (size_t *) ((char *) _start + _len); \
1192 while (_start < _stop) \
1193 *_start++ = 0; \
1194 } \
1195 else \
1196 memset(_start, _val, _len); \
1197 } while (0)
1198
1199
1200/*
1201 * Macros for range-checking float values before converting to integer.
1202 * We must be careful here that the boundary values are expressed exactly
1203 * in the float domain. PG_INTnn_MIN is an exact power of 2, so it will
1204 * be represented exactly; but PG_INTnn_MAX isn't, and might get rounded
1205 * off, so avoid using that.
1206 * The input must be rounded to an integer beforehand, typically with rint(),
1207 * else we might draw the wrong conclusion about close-to-the-limit values.
1208 * These macros will do the right thing for Inf, but not necessarily for NaN,
1209 * so check isnan(num) first if that's a possibility.
1210 */
1211#define FLOAT4_FITS_IN_INT16(num) \
1212 ((num) >= (float4) PG_INT16_MIN && (num) < -((float4) PG_INT16_MIN))
1213#define FLOAT4_FITS_IN_INT32(num) \
1214 ((num) >= (float4) PG_INT32_MIN && (num) < -((float4) PG_INT32_MIN))
1215#define FLOAT4_FITS_IN_INT64(num) \
1216 ((num) >= (float4) PG_INT64_MIN && (num) < -((float4) PG_INT64_MIN))
1217#define FLOAT8_FITS_IN_INT16(num) \
1218 ((num) >= (float8) PG_INT16_MIN && (num) < -((float8) PG_INT16_MIN))
1219#define FLOAT8_FITS_IN_INT32(num) \
1220 ((num) >= (float8) PG_INT32_MIN && (num) < -((float8) PG_INT32_MIN))
1221#define FLOAT8_FITS_IN_INT64(num) \
1222 ((num) >= (float8) PG_INT64_MIN && (num) < -((float8) PG_INT64_MIN))
1223
1224
1225/* ----------------------------------------------------------------
1226 * Section 8: random stuff
1227 * ----------------------------------------------------------------
1228 */
1229
1230/*
1231 * Invert the sign of a qsort-style comparison result, ie, exchange negative
1232 * and positive integer values, being careful not to get the wrong answer
1233 * for INT_MIN. The argument should be an integral variable.
1234 */
1235#define INVERT_COMPARE_RESULT(var) \
1236 ((var) = ((var) < 0) ? 1 : -(var))
1237
1238/*
1239 * Use this, not "char buf[BLCKSZ]", to declare a field or local variable
1240 * holding a page buffer, if that page might be accessed as a page. Otherwise
1241 * the variable might be under-aligned, causing problems on alignment-picky
1242 * hardware.
1243 */
1244typedef struct PGAlignedBlock
1245{
1246 alignas(MAXIMUM_ALIGNOF) char data[BLCKSZ];
1247} PGAlignedBlock;
1248
1249/*
1250 * alignas with extended alignments is buggy in g++ < 9. As a simple
1251 * workaround, we disable these definitions in that case.
1252 *
1253 * <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89357>
1254 */
1255#if !(defined(__cplusplus) && defined(__GNUC__) && !defined(__clang__) && __GNUC__ < 9)
1256
1257/*
1258 * Use this to declare a field or local variable holding a page buffer, if that
1259 * page might be accessed as a page or passed to an SMgr I/O function. If
1260 * allocating using the MemoryContext API, the aligned allocation functions
1261 * should be used with PG_IO_ALIGN_SIZE. This alignment may be more efficient
1262 * for I/O in general, but may be strictly required on some platforms when
1263 * using direct I/O.
1264 */
1265typedef struct PGIOAlignedBlock
1266{
1267 alignas(PG_IO_ALIGN_SIZE) char data[BLCKSZ];
1268} PGIOAlignedBlock;
1269
1270/* Same, but for an XLOG_BLCKSZ-sized buffer */
1271typedef struct PGAlignedXLogBlock
1272{
1273 alignas(PG_IO_ALIGN_SIZE) char data[XLOG_BLCKSZ];
1274} PGAlignedXLogBlock;
1275
1276#else /* (g++ < 9) */
1277
1278/* Allow these types to be used as abstract types when using old g++ */
1279typedef struct PGIOAlignedBlock PGIOAlignedBlock;
1280typedef struct PGAlignedXLogBlock PGAlignedXLogBlock;
1281
1282#endif /* !(g++ < 9) */
1283
1284/* msb for char */
1285#define HIGHBIT (0x80)
1286#define IS_HIGHBIT_SET(ch) ((unsigned char)(ch) & HIGHBIT)
1287
1288/*
1289 * Support macros for escaping strings. escape_backslash should be true
1290 * if generating a non-standard-conforming string. Prefixing a string
1291 * with ESCAPE_STRING_SYNTAX guarantees it is non-standard-conforming.
1292 * Beware of multiple evaluation of the "ch" argument!
1293 */
1294#define SQL_STR_DOUBLE(ch, escape_backslash) \
1295 ((ch) == '\'' || ((ch) == '\\' && (escape_backslash)))
1296
1297#define ESCAPE_STRING_SYNTAX 'E'
1298
1299
1300#define STATUS_OK (0)
1301#define STATUS_ERROR (-1)
1302#define STATUS_EOF (-2)
1303
1304/*
1305 * gettext support
1306 */
1307
1308#ifndef ENABLE_NLS
1309/* stuff we'd otherwise get from <libintl.h> */
1310#define gettext(x) (x)
1311#define dgettext(d,x) (x)
1312#define ngettext(s,p,n) ((n) == 1 ? (s) : (p))
1313#define dngettext(d,s,p,n) ((n) == 1 ? (s) : (p))
1314#endif
1315
1316#define _(x) gettext(x)
1317
1318/*
1319 * Use this to mark string constants as needing translation at some later
1320 * time, rather than immediately. This is useful for cases where you need
1321 * access to the original string and translated string, and for cases where
1322 * immediate translation is not possible, like when initializing global
1323 * variables.
1324 *
1325 * https://www.gnu.org/software/gettext/manual/html_node/Special-cases.html
1326 */
1327#define gettext_noop(x) (x)
1328
1329/*
1330 * To better support parallel installations of major PostgreSQL
1331 * versions as well as parallel installations of major library soname
1332 * versions, we mangle the gettext domain name by appending those
1333 * version numbers. The coding rule ought to be that wherever the
1334 * domain name is mentioned as a literal, it must be wrapped into
1335 * PG_TEXTDOMAIN(). The macros below do not work on non-literals; but
1336 * that is somewhat intentional because it avoids having to worry
1337 * about multiple states of premangling and postmangling as the values
1338 * are being passed around.
1339 *
1340 * Make sure this matches the installation rules in nls-global.mk.
1341 */
1342#ifdef SO_MAJOR_VERSION
1343#define PG_TEXTDOMAIN(domain) (domain CppAsString2(SO_MAJOR_VERSION) "-" PG_MAJORVERSION)
1344#else
1345#define PG_TEXTDOMAIN(domain) (domain "-" PG_MAJORVERSION)
1346#endif
1347
1348/*
1349 * Macro that allows to cast constness and volatile away from an expression, but doesn't
1350 * allow changing the underlying type.
1351 *
1352 * This is only meant to work for qualifiers behind at least one level of
1353 * pointer. (In the C implementation, the StaticAssertVariableIsOfTypeMacro
1354 * will drop top-level qualifiers, so with a non-pointer, the static assertion
1355 * will fail. In the C++ implementation, const_cast will error for
1356 * non-pointers.)
1357 *
1358 * Please note IT IS NOT SAFE to cast constness away if the result will ever
1359 * be modified (it would be undefined behaviour). Doing so anyway can cause
1360 * compiler misoptimizations or runtime crashes (modifying readonly memory).
1361 * It is only safe to use when the result will not be modified, but API
1362 * design or language restrictions prevent you from declaring that
1363 * (e.g. because a function returns both const and non-const variables).
1364 *
1365 * Note that this only works in function scope, not for global variables (it'd
1366 * be nice, but not trivial, to improve that).
1367 */
1368#if defined(__cplusplus)
1369#define unconstify(underlying_type, expr) const_cast<underlying_type>(expr)
1370#define unvolatize(underlying_type, expr) const_cast<underlying_type>(expr)
1371#else
1372#define unconstify(underlying_type, expr) \
1373 (StaticAssertVariableIsOfTypeMacro(expr, const underlying_type), \
1374 (underlying_type) (expr))
1375#define unvolatize(underlying_type, expr) \
1376 (StaticAssertVariableIsOfTypeMacro(expr, volatile underlying_type), \
1377 (underlying_type) (expr))
1378#endif
1379
1380/*
1381 * SSE2 instructions are part of the spec for the 64-bit x86 ISA. We assume
1382 * that compilers targeting this architecture understand SSE2 intrinsics.
1383 */
1384#if defined(__x86_64__)
1385#define USE_SSE2
1386
1387#else /* ! x86_64 */
1388
1389/*
1390 * In "universal" macOS builds, it's possible for AVX-related symbols to
1391 * get defined if the build host is x86_64, but we mustn't try to build
1392 * that code when cross-compiling to aarch64.
1393 */
1394#undef USE_AVX2_WITH_RUNTIME_CHECK
1395#undef USE_AVX512_CRC32C_WITH_RUNTIME_CHECK
1396#undef USE_AVX512_POPCNT_WITH_RUNTIME_CHECK
1397
1398/*
1399 * We use the Neon instructions if the compiler provides access to them (as
1400 * indicated by __ARM_NEON) and we are on aarch64. While Neon support is
1401 * technically optional for aarch64, it appears that all available 64-bit
1402 * hardware does have it. Neon exists in some 32-bit hardware too, but we
1403 * could not realistically use it there without a run-time check, which seems
1404 * not worth the trouble for now.
1405 */
1406#if defined(__aarch64__) && defined(__ARM_NEON)
1407#define USE_NEON
1408#endif
1409#endif /* x86_64 */
1410
1411/* ----------------------------------------------------------------
1412 * Section 9: system-specific hacks
1413 *
1414 * This should be limited to things that absolutely have to be
1415 * included in every source file. The port-specific header file
1416 * is usually a better place for this sort of thing.
1417 * ----------------------------------------------------------------
1418 */
1419
1420/*
1421 * NOTE: this is also used for opening text files.
1422 * WIN32 treats Control-Z as EOF in files opened in text mode.
1423 * Therefore, we open files in binary mode on Win32 so we can read
1424 * literal control-Z. The other affect is that we see CRLF, but
1425 * that is OK because we can already handle those cleanly.
1426 */
1427#if defined(WIN32) || defined(__CYGWIN__)
1428#define PG_BINARY O_BINARY
1429#define PG_BINARY_A "ab"
1430#define PG_BINARY_R "rb"
1431#define PG_BINARY_W "wb"
1432#else
1433#define PG_BINARY 0
1434#define PG_BINARY_A "a"
1435#define PG_BINARY_R "r"
1436#define PG_BINARY_W "w"
1437#endif
1438
1439/*
1440 * Provide prototypes for routines not present in a particular machine's
1441 * standard C library.
1442 */
1443
1444#if !HAVE_DECL_FDATASYNC
1445extern int fdatasync(int fd);
1446#endif
1447
1448/*
1449 * Thin wrappers that convert strings to exactly 64-bit integers, matching our
1450 * definition of int64. (For the naming, compare that POSIX has
1451 * strtoimax()/strtoumax() which return intmax_t/uintmax_t.)
1452 */
1453#if SIZEOF_LONG == 8
1454#define strtoi64(str, endptr, base) ((int64) strtol(str, endptr, base))
1455#define strtou64(str, endptr, base) ((uint64) strtoul(str, endptr, base))
1456#elif SIZEOF_LONG_LONG == 8
1457#define strtoi64(str, endptr, base) ((int64) strtoll(str, endptr, base))
1458#define strtou64(str, endptr, base) ((uint64) strtoull(str, endptr, base))
1459#else
1460#error "cannot find integer type of the same size as int64_t"
1461#endif
1462
1463/*
1464 * Similarly, wrappers around labs()/llabs() matching our int64.
1465 */
1466#if SIZEOF_LONG == 8
1467#define i64abs(i) ((int64) labs(i))
1468#elif SIZEOF_LONG_LONG == 8
1469#define i64abs(i) ((int64) llabs(i))
1470#else
1471#error "cannot find integer type of the same size as int64_t"
1472#endif
1473
1474/*
1475 * Use "extern PGDLLIMPORT ..." to declare variables that are defined
1476 * in the core backend and need to be accessible by loadable modules.
1477 * No special marking is required on most ports.
1478 */
1479#ifndef PGDLLIMPORT
1480#define PGDLLIMPORT
1481#endif
1482
1483/*
1484 * Use "extern PGDLLEXPORT ..." to declare functions that are defined in
1485 * loadable modules and need to be callable by the core backend or other
1486 * loadable modules.
1487 * If the compiler knows __attribute__((visibility("*"))), we use that,
1488 * unless we already have a platform-specific definition. Otherwise,
1489 * no special marking is required.
1490 */
1491#ifndef PGDLLEXPORT
1492#ifdef HAVE_VISIBILITY_ATTRIBUTE
1493#define PGDLLEXPORT __attribute__((visibility("default")))
1494#else
1495#define PGDLLEXPORT
1496#endif
1497#endif
1498
1499/*
1500 * Platform independent struct representing additional information about the
1501 * received signal. If the system does not support the extended information,
1502 * or a field does not apply to the signal, the value is instead reset to the
1503 * documented default value.
1504 */
1505
1506typedef struct pg_signal_info
1507{
1508 uint32_t pid; /* pid of sending process or 0 if unknown */
1509 uint32_t uid; /* uid of sending process; only meaningful
1510 * when pid is not 0 */
1511} pg_signal_info;
1512
1513/*
1514 * The following is used as the arg list for signal handlers. These days we
1515 * use the same argument to all signal handlers and hide the difference
1516 * between platforms in wrapper functions.
1517 *
1518 * SIGNAL_ARGS just exists separately from the pqsignal() definition for
1519 * historical reasons.
1520 */
1521#define SIGNAL_ARGS int postgres_signal_arg, const pg_signal_info *pg_siginfo
1522
1523/*
1524 * When there is no sigsetjmp, its functionality is provided by plain
1525 * setjmp. We now support the case only on Windows. However, it seems
1526 * that MinGW-64 has some longstanding issues in its setjmp support,
1527 * so on that toolchain we cheat and use gcc's builtins.
1528 */
1529#ifdef WIN32
1530#ifdef __MINGW64__
1531typedef intptr_t sigjmp_buf[5];
1532#define sigsetjmp(x,y) __builtin_setjmp(x)
1533#define siglongjmp __builtin_longjmp
1534#else /* !__MINGW64__ */
1535#define sigjmp_buf jmp_buf
1536#define sigsetjmp(x,y) setjmp(x)
1537#define siglongjmp longjmp
1538#endif /* __MINGW64__ */
1539#endif /* WIN32 */
1540
1541/* /port compatibility functions */
1542#include "port.h"
1543
1544/*
1545 * char16_t and char32_t
1546 * Unicode code points.
1547 *
1548 * uchar.h should always be available in C11, but it's not available on
1549 * Mac. However, these types are keywords in C++11, so when using C++, we
1550 * can't redefine the types.
1551 *
1552 * XXX: when uchar.h is available everywhere, we can remove this check and
1553 * just include uchar.h unconditionally.
1554 *
1555 * XXX: this section is out of place because uchar.h needs to be included
1556 * after port.h, due to an interaction with win32_port.h in some cases.
1557 */
1558#ifdef HAVE_UCHAR_H
1559#include <uchar.h>
1560#else
1561#ifndef __cplusplus
1562typedef uint16_t char16_t;
1563typedef uint32_t char32_t;
1564#endif
1565#endif
1566
1567/* IWYU pragma: end_exports */
1568
1569#endif /* C_H */
fdatasync
int fdatasync(int fd)
Definition win32fdatasync.c:23
char16_t
uint16_t char16_t
Definition c.h:1560
char32_t
uint32_t char32_t
Definition c.h:1561
PG_IO_ALIGN_SIZE
#define PG_IO_ALIGN_SIZE
Definition pg_config_manual.h:223
fd
static int fd(const char *x, int i)
Definition preproc-init.c:105
fb
static int fb(int x)
Definition preproc-init.c:92
PGAlignedBlock::data
char data[BLCKSZ]
Definition c.h:1244
PGAlignedXLogBlock::data
char data[XLOG_BLCKSZ]
Definition c.h:1271
PGIOAlignedBlock::data
char data[BLCKSZ]
Definition c.h:1265
pg_signal_info
Definition c.h:1505
pg_signal_info::pid
uint32_t pid
Definition c.h:1506
pg_signal_info::uid
uint32_t uid
Definition c.h:1507

◆ BoolIsValid

#define BoolIsValid (   boolean)    ((boolean) == false || (boolean) == true)

Definition at line 905 of file c.h.

◆ BUFFERALIGN

#define BUFFERALIGN (   LEN)    TYPEALIGN(ALIGNOF_BUFFER, (LEN))

Definition at line 957 of file c.h.

◆ BUFFERALIGN_DOWN

#define BUFFERALIGN_DOWN (   LEN)    TYPEALIGN_DOWN(ALIGNOF_BUFFER, (LEN))

Definition at line 968 of file c.h.

◆ CACHELINEALIGN

#define CACHELINEALIGN (   LEN)    TYPEALIGN(PG_CACHE_LINE_SIZE, (LEN))

Definition at line 958 of file c.h.

◆ CppAsString

#define CppAsString (   identifier)    #identifier

Definition at line 564 of file c.h.

◆ CppAsString2

#define CppAsString2 (   x)    CppAsString(x)

Definition at line 565 of file c.h.

◆ CppConcat

#define CppConcat (   x,
  y 
)    x##y

Definition at line 566 of file c.h.

◆ dgettext

#define dgettext (   d,
  x 
)    (x)

Definition at line 1309 of file c.h.

◆ dngettext

#define dngettext (   d,
  s,
  p,
  n 
)    ((n) == 1 ? (s) : (p))

Definition at line 1311 of file c.h.

◆ DOUBLEALIGN

#define DOUBLEALIGN (   LEN)    TYPEALIGN(ALIGNOF_DOUBLE, (LEN))

Definition at line 954 of file c.h.

◆ DOUBLEALIGN_DOWN

#define DOUBLEALIGN_DOWN (   LEN)    TYPEALIGN_DOWN(ALIGNOF_DOUBLE, (LEN))

Definition at line 966 of file c.h.

◆ ESCAPE_STRING_SYNTAX

#define ESCAPE_STRING_SYNTAX   'E'

Definition at line 1295 of file c.h.

◆ FirstCommandId

#define FirstCommandId   ((CommandId) 0)

Definition at line 811 of file c.h.

◆ FLEXIBLE_ARRAY_MEMBER

#define FLEXIBLE_ARRAY_MEMBER   /* empty */

Definition at line 617 of file c.h.

◆ FLOAT4_FITS_IN_INT16

#define FLOAT4_FITS_IN_INT16 (   num)     ((num) >= (float4) PG_INT16_MIN && (num) < -((float4) PG_INT16_MIN))

Definition at line 1209 of file c.h.

◆ FLOAT4_FITS_IN_INT32

#define FLOAT4_FITS_IN_INT32 (   num)     ((num) >= (float4) PG_INT32_MIN && (num) < -((float4) PG_INT32_MIN))

Definition at line 1211 of file c.h.

◆ FLOAT4_FITS_IN_INT64

#define FLOAT4_FITS_IN_INT64 (   num)     ((num) >= (float4) PG_INT64_MIN && (num) < -((float4) PG_INT64_MIN))

Definition at line 1213 of file c.h.

◆ FLOAT8_FITS_IN_INT16

#define FLOAT8_FITS_IN_INT16 (   num)     ((num) >= (float8) PG_INT16_MIN && (num) < -((float8) PG_INT16_MIN))

Definition at line 1215 of file c.h.

◆ FLOAT8_FITS_IN_INT32

#define FLOAT8_FITS_IN_INT32 (   num)     ((num) >= (float8) PG_INT32_MIN && (num) < -((float8) PG_INT32_MIN))

Definition at line 1217 of file c.h.

◆ FLOAT8_FITS_IN_INT64

#define FLOAT8_FITS_IN_INT64 (   num)     ((num) >= (float8) PG_INT64_MIN && (num) < -((float8) PG_INT64_MIN))

Definition at line 1219 of file c.h.

◆ FLOAT8PASSBYVAL

#define FLOAT8PASSBYVAL   true

Definition at line 779 of file c.h.

◆ gettext

#define gettext (   x)    (x)

Definition at line 1308 of file c.h.

◆ gettext_noop

#define gettext_noop (   x)    (x)

Definition at line 1325 of file c.h.

◆ HAVE_INT64_TIMESTAMP

#define HAVE_INT64_TIMESTAMP

Definition at line 742 of file c.h.

◆ HIGHBIT

#define HIGHBIT   (0x80)

Definition at line 1283 of file c.h.

◆ INT64_FORMAT

#define INT64_FORMAT   "%" PRId64

Definition at line 693 of file c.h.

◆ INT64ALIGN

#define INT64ALIGN (   LEN)    TYPEALIGN(ALIGNOF_INT64_T, (LEN))

Definition at line 953 of file c.h.

◆ INT64ALIGN_DOWN

#define INT64ALIGN_DOWN (   LEN)    TYPEALIGN_DOWN(ALIGNOF_INT64_T, (LEN))

Definition at line 965 of file c.h.

◆ INT64CONST

#define INT64CONST (   x)    INT64_C(x)

Definition at line 689 of file c.h.

◆ INTALIGN

#define INTALIGN (   LEN)    TYPEALIGN(ALIGNOF_INT, (LEN))

Definition at line 952 of file c.h.

◆ INTALIGN_DOWN

#define INTALIGN_DOWN (   LEN)    TYPEALIGN_DOWN(ALIGNOF_INT, (LEN))

Definition at line 964 of file c.h.

◆ InvalidCommandId

#define InvalidCommandId   (~(CommandId)0)

Definition at line 812 of file c.h.

◆ InvalidOid8

#define InvalidOid8   ((Oid8) 0)

Definition at line 817 of file c.h.

◆ InvalidSubTransactionId

#define InvalidSubTransactionId   ((SubTransactionId) 0)

Definition at line 801 of file c.h.

◆ INVERT_COMPARE_RESULT

#define INVERT_COMPARE_RESULT (   var)     ((var) = ((var) < 0) ? 1 : -(var))

Definition at line 1233 of file c.h.

◆ IS_HIGHBIT_SET

#define IS_HIGHBIT_SET (   ch)    ((unsigned char)(ch) & HIGHBIT)

Definition at line 1284 of file c.h.

◆ lengthof

#define lengthof (   array)    (sizeof (array) / sizeof ((array)[0]))

Definition at line 932 of file c.h.

◆ likely

#define likely (   x)    ((x) != 0)

Definition at line 496 of file c.h.

◆ Max

#define Max (   x,
  y 
)    ((x) > (y) ? (x) : (y))

Definition at line 1125 of file c.h.

◆ MAXALIGN

#define MAXALIGN (   LEN)    TYPEALIGN(MAXIMUM_ALIGNOF, (LEN))

Definition at line 955 of file c.h.

◆ MAXALIGN64

#define MAXALIGN64 (   LEN)    TYPEALIGN64(MAXIMUM_ALIGNOF, (LEN))

Definition at line 980 of file c.h.

◆ MAXALIGN_DOWN

#define MAXALIGN_DOWN (   LEN)    TYPEALIGN_DOWN(MAXIMUM_ALIGNOF, (LEN))

Definition at line 967 of file c.h.

◆ MemSet

#define MemSet (   start,
  val,
  len 
)
Value:
do \
{ \
/* must be void* because we don't know if it is size_t aligned yet */ \
void *_vstart = (void *) (start); \
int _val = (val); \
Size _len = (len); \
\
if ((((uintptr_t) _vstart) & SIZE_T_ALIGN_MASK) == 0 && \
(_len & SIZE_T_ALIGN_MASK) == 0 && \
_val == 0 && \
_len <= MEMSET_LOOP_LIMIT && \
/* \
* If MEMSET_LOOP_LIMIT == 0, optimizer should find \
* the whole "if" false at compile time. \
*/ \
MEMSET_LOOP_LIMIT != 0) \
{ \
size_t *_start = (size_t *) _vstart; \
size_t *_stop = (size_t *) ((char *) _start + _len); \
while (_start < _stop) \
*_start++ = 0; \
} \
else \
memset(_vstart, _val, _len); \
} while (0)
SIZE_T_ALIGN_MASK
#define SIZE_T_ALIGN_MASK
Definition c.h:1135
Size
size_t Size
Definition c.h:748
start
return str start
Definition hashfn_unstable.h:290
val
long val
Definition informix.c:689
len
const void size_t len
Definition pg_crc32c_sse42.c:31

Definition at line 1147 of file c.h.

1149 { \
1150 /* must be void* because we don't know if it is size_t aligned yet */ \
1151 void *_vstart = (void *) (start); \
1152 int _val = (val); \
1153 Size _len = (len); \
1154\
1155 if ((((uintptr_t) _vstart) & SIZE_T_ALIGN_MASK) == 0 && \
1156 (_len & SIZE_T_ALIGN_MASK) == 0 && \
1157 _val == 0 && \
1158 _len <= MEMSET_LOOP_LIMIT && \
1159 /* \
1160 * If MEMSET_LOOP_LIMIT == 0, optimizer should find \
1161 * the whole "if" false at compile time. \
1162 */ \
1163 MEMSET_LOOP_LIMIT != 0) \
1164 { \
1165 size_t *_start = (size_t *) _vstart; \
1166 size_t *_stop = (size_t *) ((char *) _start + _len); \
1167 while (_start < _stop) \
1168 *_start++ = 0; \
1169 } \

◆ MemSetAligned

#define MemSetAligned (   start,
  val,
  len 
)
Value:
do \
{ \
size_t *_start = (size_t *) (start); \
int _val = (val); \
Size _len = (len); \
\
if ((_len & SIZE_T_ALIGN_MASK) == 0 && \
_val == 0 && \
_len <= MEMSET_LOOP_LIMIT && \
MEMSET_LOOP_LIMIT != 0) \
{ \
size_t *_stop = (size_t *) ((char *) _start + _len); \
while (_start < _stop) \
*_start++ = 0; \
} \
else \
memset(_start, _val, _len); \
} while (0)

Definition at line 1177 of file c.h.

1182 { \
1183 size_t *_start = (size_t *) (start); \
1184 int _val = (val); \
1185 Size _len = (len); \
1186\
1187 if ((_len & SIZE_T_ALIGN_MASK) == 0 && \
1188 _val == 0 && \
1189 _len <= MEMSET_LOOP_LIMIT && \
1190 MEMSET_LOOP_LIMIT != 0) \
1191 { \
1192 size_t *_stop = (size_t *) ((char *) _start + _len); \
1193 while (_start < _stop) \
1194 *_start++ = 0; \
1195 } \

◆ Min

#define Min (   x,
  y 
)    ((x) < (y) ? (x) : (y))

Definition at line 1131 of file c.h.

◆ NameStr

#define NameStr (   name)    ((name).data)

Definition at line 894 of file c.h.

◆ ngettext

#define ngettext (   s,
  p,
  n 
)    ((n) == 1 ? (s) : (p))

Definition at line 1310 of file c.h.

◆ OffsetToPointer

#define OffsetToPointer (   base,
  offset 
)     ((void *)((char *) base + offset))

Definition at line 914 of file c.h.

◆ OID8_FORMAT

#define OID8_FORMAT   "%" PRIu64

Definition at line 695 of file c.h.

◆ OID8_MAX

#define OID8_MAX   UINT64_MAX

Definition at line 818 of file c.h.

◆ Oid8IsValid

#define Oid8IsValid (   objectId)    ((bool) ((objectId) != InvalidOid8))

Definition at line 919 of file c.h.

◆ OidIsValid

#define OidIsValid (   objectId)    ((bool) ((objectId) != InvalidOid))

Definition at line 917 of file c.h.

◆ pg_always_inline

#define pg_always_inline   inline

Definition at line 364 of file c.h.

◆ pg_assume

#define pg_assume (   expr)    ((void) 0)

Definition at line 482 of file c.h.

◆ pg_attribute_cold

#define pg_attribute_cold

Definition at line 405 of file c.h.

◆ pg_attribute_format_arg

#define pg_attribute_format_arg (   a)

Definition at line 326 of file c.h.

◆ pg_attribute_hot

#define pg_attribute_hot

Definition at line 411 of file c.h.

◆ pg_attribute_no_sanitize_address

#define pg_attribute_no_sanitize_address ( )

Definition at line 262 of file c.h.

◆ pg_attribute_no_sanitize_alignment

#define pg_attribute_no_sanitize_alignment ( )

Definition at line 274 of file c.h.

◆ pg_attribute_nonnull

#define pg_attribute_nonnull (   ...)

Definition at line 285 of file c.h.

◆ pg_attribute_printf

#define pg_attribute_printf (   f,
  a 
)

Definition at line 327 of file c.h.

◆ pg_attribute_target

#define pg_attribute_target (   ...)

Definition at line 297 of file c.h.

◆ pg_attribute_unused

#define pg_attribute_unused ( )

Definition at line 208 of file c.h.

◆ PG_BINARY

#define PG_BINARY   0

Definition at line 1431 of file c.h.

◆ PG_BINARY_A

#define PG_BINARY_A   "a"

Definition at line 1432 of file c.h.

◆ PG_BINARY_R

#define PG_BINARY_R   "r"

Definition at line 1433 of file c.h.

◆ PG_BINARY_W

#define PG_BINARY_W   "w"

Definition at line 1434 of file c.h.

◆ pg_fallthrough

#define pg_fallthrough

Definition at line 220 of file c.h.

◆ PG_INT16_MAX

#define PG_INT16_MAX   INT16_MAX

Definition at line 729 of file c.h.

◆ PG_INT16_MIN

#define PG_INT16_MIN   INT16_MIN

Definition at line 728 of file c.h.

◆ PG_INT32_MAX

#define PG_INT32_MAX   INT32_MAX

Definition at line 732 of file c.h.

◆ PG_INT32_MIN

#define PG_INT32_MIN   INT32_MIN

Definition at line 731 of file c.h.

◆ PG_INT64_MAX

#define PG_INT64_MAX   INT64_MAX

Definition at line 735 of file c.h.

◆ PG_INT64_MIN

#define PG_INT64_MIN   INT64_MIN

Definition at line 734 of file c.h.

◆ PG_INT8_MAX

#define PG_INT8_MAX   INT8_MAX

Definition at line 726 of file c.h.

◆ PG_INT8_MIN

#define PG_INT8_MIN   INT8_MIN

Definition at line 725 of file c.h.

◆ pg_nodiscard

#define pg_nodiscard

Definition at line 232 of file c.h.

◆ pg_noinline

#define pg_noinline

Definition at line 380 of file c.h.

◆ pg_noreturn

#define pg_noreturn   _Noreturn

Definition at line 249 of file c.h.

◆ PG_PRINTF_ATTRIBUTE

#define PG_PRINTF_ATTRIBUTE   PG_C_PRINTF_ATTRIBUTE

Definition at line 316 of file c.h.

◆ PG_TEXTDOMAIN

#define PG_TEXTDOMAIN (   domain)    (domain "-" PG_MAJORVERSION)

Definition at line 1343 of file c.h.

◆ PG_UINT16_MAX

#define PG_UINT16_MAX   UINT16_MAX

Definition at line 730 of file c.h.

◆ PG_UINT32_MAX

#define PG_UINT32_MAX   UINT32_MAX

Definition at line 733 of file c.h.

◆ PG_UINT64_MAX

#define PG_UINT64_MAX   UINT64_MAX

Definition at line 736 of file c.h.

◆ PG_UINT8_MAX

#define PG_UINT8_MAX   UINT8_MAX

Definition at line 727 of file c.h.

◆ pg_unreachable

#define pg_unreachable ( )    abort()

Definition at line 426 of file c.h.

◆ PG_USED_FOR_ASSERTS_ONLY

#define PG_USED_FOR_ASSERTS_ONLY   pg_attribute_unused()

Definition at line 308 of file c.h.

◆ PGDLLEXPORT

#define PGDLLEXPORT

Definition at line 1493 of file c.h.

◆ PGDLLIMPORT

#define PGDLLIMPORT

Definition at line 1478 of file c.h.

◆ PointerIsAligned

#define PointerIsAligned (   pointer,
  type 
)     (((uintptr_t)(pointer) % (sizeof (type))) == 0)

Definition at line 911 of file c.h.

◆ RegProcedureIsValid

#define RegProcedureIsValid (   p)    OidIsValid(p)

Definition at line 921 of file c.h.

◆ SHORTALIGN

#define SHORTALIGN (   LEN)    TYPEALIGN(ALIGNOF_SHORT, (LEN))

Definition at line 951 of file c.h.

◆ SHORTALIGN_DOWN

#define SHORTALIGN_DOWN (   LEN)    TYPEALIGN_DOWN(ALIGNOF_SHORT, (LEN))

Definition at line 963 of file c.h.

◆ SIGNAL_ARGS

#define SIGNAL_ARGS   int postgres_signal_arg, const pg_signal_info *pg_siginfo

Definition at line 1519 of file c.h.

◆ SIZE_T_ALIGN_MASK

#define SIZE_T_ALIGN_MASK   (sizeof(size_t) - 1)

Definition at line 1135 of file c.h.

◆ SQL_STR_DOUBLE

#define SQL_STR_DOUBLE (   ch,
  escape_backslash 
)     ((ch) == '\'' || ((ch) == '\\' && (escape_backslash)))

Definition at line 1292 of file c.h.

◆ StaticAssertDecl

#define StaticAssertDecl (   condition,
  errmessage 
)     static_assert(condition, errmessage)

Definition at line 1067 of file c.h.

◆ StaticAssertExpr

#define StaticAssertExpr (   condition,
  errmessage 
)     ((void) sizeof(struct {static_assert(condition, errmessage); char a;}))

Definition at line 1086 of file c.h.

1087 {static_assert(condition, errmessage); char a;}))
a
int a
Definition isn.c:73

◆ StaticAssertStmt

#define StaticAssertStmt (   condition,
  errmessage 
)     do { static_assert(condition, errmessage); } while(0)

Definition at line 1074 of file c.h.

1075 { static_assert(condition, errmessage); } while(0)

◆ StaticAssertVariableIsOfType

#define StaticAssertVariableIsOfType (   varname,
  typename 
)
Value:
StaticAssertDecl(_Generic((varname), typename: 1, default: 0), \
CppAsString(varname) " does not have type " CppAsString(typename))
CppAsString
#define CppAsString(identifier)
Definition c.h:564
StaticAssertDecl
#define StaticAssertDecl(condition, errmessage)
Definition c.h:1067

Definition at line 1109 of file c.h.

1110 : 1, default: 0), \
1111 CppAsString(varname) " does not have type " CppAsString(typename))

◆ StaticAssertVariableIsOfTypeMacro

#define StaticAssertVariableIsOfTypeMacro (   varname,
  typename 
)
Value:
(StaticAssertExpr(_Generic((varname), typename: 1, default: 0), \
CppAsString(varname) " does not have type " CppAsString(typename)))
StaticAssertExpr
#define StaticAssertExpr(condition, errmessage)
Definition c.h:1086

Definition at line 1112 of file c.h.

1113 : 1, default: 0), \
1114 CppAsString(varname) " does not have type " CppAsString(typename)))

◆ STATUS_EOF

#define STATUS_EOF   (-2)

Definition at line 1300 of file c.h.

◆ STATUS_ERROR

#define STATUS_ERROR   (-1)

Definition at line 1299 of file c.h.

◆ STATUS_OK

#define STATUS_OK   (0)

Definition at line 1298 of file c.h.

◆ TopSubTransactionId

#define TopSubTransactionId   ((SubTransactionId) 1)

Definition at line 802 of file c.h.

◆ TYPEALIGN

#define TYPEALIGN (   ALIGNVAL,
  LEN 
)     (((uintptr_t) (LEN) + ((ALIGNVAL) - 1)) & ~((uintptr_t) ((ALIGNVAL) - 1)))

Definition at line 948 of file c.h.

◆ TYPEALIGN64

#define TYPEALIGN64 (   ALIGNVAL,
  LEN 
)     (((uint64) (LEN) + ((ALIGNVAL) - 1)) & ~((uint64) ((ALIGNVAL) - 1)))

Definition at line 976 of file c.h.

◆ TYPEALIGN_DOWN

#define TYPEALIGN_DOWN (   ALIGNVAL,
  LEN 
)     (((uintptr_t) (LEN)) & ~((uintptr_t) ((ALIGNVAL) - 1)))

Definition at line 960 of file c.h.

◆ UINT64_FORMAT

#define UINT64_FORMAT   "%" PRIu64

Definition at line 694 of file c.h.

◆ UINT64CONST

#define UINT64CONST (   x)    UINT64_C(x)

Definition at line 690 of file c.h.

◆ unconstify

#define unconstify (   underlying_type,
  expr 
)
Value:
(StaticAssertVariableIsOfTypeMacro(expr, const underlying_type), \
(underlying_type) (expr))
StaticAssertVariableIsOfTypeMacro
#define StaticAssertVariableIsOfTypeMacro(varname, typename)
Definition c.h:1112

Definition at line 1370 of file c.h.

◆ unlikely

#define unlikely (   x)    ((x) != 0)

Definition at line 497 of file c.h.

◆ unvolatize

#define unvolatize (   underlying_type,
  expr 
)
Value:
(StaticAssertVariableIsOfTypeMacro(expr, volatile underlying_type), \
(underlying_type) (expr))

Definition at line 1373 of file c.h.

◆ VA_ARGS_NARGS

#define VA_ARGS_NARGS (   ...)
Value:
VA_ARGS_NARGS_(__VA_ARGS__, \
63,62,61,60, \
59,58,57,56,55,54,53,52,51,50, \
49,48,47,46,45,44,43,42,41,40, \
39,38,37,36,35,34,33,32,31,30, \
29,28,27,26,25,24,23,22,21,20, \
19,18,17,16,15,14,13,12,11,10, \
9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
VA_ARGS_NARGS_
#define VA_ARGS_NARGS_(_01, _02, _03, _04, _05, _06, _07, _08, _09, _10, _11, _12, _13, _14, _15, _16, _17, _18, _19, _20, _21, _22, _23, _24, _25, _26, _27, _28, _29, _30, _31, _32, _33, _34, _35, _36, _37, _38, _39, _40, _41, _42, _43, _44, _45, _46, _47, _48, _49, _50, _51, _52, _53, _54, _55, _56, _57, _58, _59, _60, _61, _62, _63, N,...)
Definition c.h:592

Definition at line 582 of file c.h.

◆ VA_ARGS_NARGS_

#define VA_ARGS_NARGS_ (   _01,
  _02,
  _03,
  _04,
  _05,
  _06,
  _07,
  _08,
  _09,
  _10,
  _11,
  _12,
  _13,
  _14,
  _15,
  _16,
  _17,
  _18,
  _19,
  _20,
  _21,
  _22,
  _23,
  _24,
  _25,
  _26,
  _27,
  _28,
  _29,
  _30,
  _31,
  _32,
  _33,
  _34,
  _35,
  _36,
  _37,
  _38,
  _39,
  _40,
  _41,
  _42,
  _43,
  _44,
  _45,
  _46,
  _47,
  _48,
  _49,
  _50,
  _51,
  _52,
  _53,
  _54,
  _55,
  _56,
  _57,
  _58,
  _59,
  _60,
  _61,
  _62,
  _63,
  N,
  ... 
)     (N)

Definition at line 592 of file c.h.

◆ VARHDRSZ

#define VARHDRSZ   ((int32) sizeof(int32))

Definition at line 840 of file c.h.

Typedef Documentation

◆ BpChar

typedef varlena BpChar

Definition at line 849 of file c.h.

◆ bytea

typedef varlena bytea

Definition at line 847 of file c.h.

◆ char16_t

typedef uint16_t char16_t

Definition at line 1560 of file c.h.

◆ char32_t

typedef uint32_t char32_t

Definition at line 1561 of file c.h.

◆ CommandId

typedef uint32 CommandId

Definition at line 809 of file c.h.

◆ float4

typedef float float4

Definition at line 772 of file c.h.

◆ float8

typedef double float8

Definition at line 773 of file c.h.

◆ Index

typedef unsigned int Index

Definition at line 757 of file c.h.

◆ int16

typedef int16_t int16

Definition at line 678 of file c.h.

◆ int32

typedef int32_t int32

Definition at line 679 of file c.h.

◆ int64

typedef int64_t int64

Definition at line 680 of file c.h.

◆ int8

typedef int8_t int8

Definition at line 677 of file c.h.

◆ LocalTransactionId

typedef uint32 LocalTransactionId

Definition at line 797 of file c.h.

◆ MultiXactId

typedef TransactionId MultiXactId

Definition at line 805 of file c.h.

◆ MultiXactOffset

typedef uint64 MultiXactOffset

Definition at line 807 of file c.h.

◆ Name

typedef NameData* Name

Definition at line 892 of file c.h.

◆ NameData

typedef struct nameData NameData

◆ Offset

typedef signed int Offset

Definition at line 767 of file c.h.

◆ Oid8

typedef uint64 Oid8

Definition at line 815 of file c.h.

◆ pg_funcptr_t

typedef void(* pg_funcptr_t) (void)

Definition at line 607 of file c.h.

◆ pg_signal_info

typedef struct pg_signal_info pg_signal_info

◆ PGAlignedBlock

typedef struct PGAlignedBlock PGAlignedBlock

◆ PGAlignedXLogBlock

typedef struct PGAlignedXLogBlock PGAlignedXLogBlock

◆ PGIOAlignedBlock

typedef struct PGIOAlignedBlock PGIOAlignedBlock

◆ Pointer

typedef void* Pointer

Definition at line 674 of file c.h.

◆ regproc

typedef Oid regproc

Definition at line 792 of file c.h.

◆ RegProcedure

typedef regproc RegProcedure

Definition at line 793 of file c.h.

◆ Size

typedef size_t Size

Definition at line 748 of file c.h.

◆ SubTransactionId

typedef uint32 SubTransactionId

Definition at line 799 of file c.h.

◆ text

typedef varlena text

Definition at line 848 of file c.h.

◆ TransactionId

typedef uint32 TransactionId

Definition at line 795 of file c.h.

◆ uint16

typedef uint16_t uint16

Definition at line 682 of file c.h.

◆ uint32

typedef uint32_t uint32

Definition at line 683 of file c.h.

◆ uint64

typedef uint64_t uint64

Definition at line 684 of file c.h.

◆ uint8

typedef uint8_t uint8

Definition at line 681 of file c.h.

◆ VarChar

typedef varlena VarChar

Definition at line 850 of file c.h.

◆ varlena

typedef struct varlena varlena

Function Documentation

◆ ExceptionalCondition()

pg_noreturn void ExceptionalCondition ( const char *  conditionName,
const char *  fileName,
int  lineNumber 
)
extern

Definition at line 30 of file assert.c.

33{
34 /* Report the failure on stderr (or local equivalent) */
35 if (!conditionName || !fileName)
36 write_stderr("TRAP: ExceptionalCondition: bad arguments in PID %d\n",
37 (int) getpid());
38 else
39 write_stderr("TRAP: failed Assert(\"%s\"), File: \"%s\", Line: %d, PID: %d\n",
40 conditionName, fileName, lineNumber, (int) getpid());
41
42 /* Usually this shouldn't be needed, but make sure the msg went out */
43 fflush(stderr);
44
45 /* If we have support for it, dump a simple backtrace */
46#ifdef HAVE_BACKTRACE_SYMBOLS
47 {
48 void *buf[100];
49 int nframes;
50
51 nframes = backtrace(buf, lengthof(buf));
52 backtrace_symbols_fd(buf, nframes, fileno(stderr));
53 }
54#endif
55
56 /*
57 * If configured to do so, sleep indefinitely to allow user to attach a
58 * debugger. It would be nice to use pg_usleep() here, but that can sleep
59 * at most 2G usec or ~33 minutes, which seems too short.
60 */
61#ifdef SLEEP_ON_ASSERT
62 sleep(1000000);
63#endif
64
65 abort();
66}
write_stderr
#define write_stderr(str)
Definition parallel.c:186
lengthof
#define lengthof(array)
Definition c.h:932
buf
static char buf[DEFAULT_XLOG_SEG_SIZE]
Definition pg_test_fsync.c:71

References buf, fb(), lengthof, and write_stderr.

Referenced by pg_re_throw().

◆ fdatasync()

int fdatasync ( int  fd)
extern

Definition at line 23 of file win32fdatasync.c.

24{
25 IO_STATUS_BLOCK iosb;
26 NTSTATUS status;
27 HANDLE handle;
28
29 handle = (HANDLE) _get_osfhandle(fd);
30 if (handle == INVALID_HANDLE_VALUE)
31 {
32 errno = EBADF;
33 return -1;
34 }
35
36 if (initialize_ntdll() < 0)
37 return -1;
38
39 memset(&iosb, 0, sizeof(iosb));
40 status = pg_NtFlushBuffersFileEx(handle,
41 FLUSH_FLAGS_FILE_DATA_SYNC_ONLY,
42 NULL,
43 0,
44 &iosb);
45
46 if (NT_SUCCESS(status))
47 return 0;
48
49 _dosmaperr(pg_RtlNtStatusToDosError(status));
50 return -1;
51}
_dosmaperr
void _dosmaperr(unsigned long)
Definition win32error.c:177
pg_NtFlushBuffersFileEx
PGDLLIMPORT NtFlushBuffersFileEx_t pg_NtFlushBuffersFileEx
Definition win32ntdll.c:22
initialize_ntdll
int initialize_ntdll(void)
Definition win32ntdll.c:39
FLUSH_FLAGS_FILE_DATA_SYNC_ONLY
#define FLUSH_FLAGS_FILE_DATA_SYNC_ONLY
Definition win32ntdll.h:21
pg_RtlNtStatusToDosError
PGDLLIMPORT RtlNtStatusToDosError_t pg_RtlNtStatusToDosError
Definition win32ntdll.c:21

References _dosmaperr(), fb(), fd(), FLUSH_FLAGS_FILE_DATA_SYNC_ONLY, initialize_ntdll(), pg_NtFlushBuffersFileEx, and pg_RtlNtStatusToDosError.

Referenced by pg_fdatasync(), and test_sync().