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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
 

Macros

#define __has_attribute(attribute)   0
 
#define pg_attribute_unused()
 
#define pg_nodiscard
 
#define pg_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_attribute_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 LONGALIGN(LEN)   TYPEALIGN(ALIGNOF_LONG, (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 LONGALIGN_DOWN(LEN)   TYPEALIGN_DOWN(ALIGNOF_LONG, (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 { int static_assert_failure : (condition) ? 1 : -1; }))
 
#define AssertVariableIsOfType(varname, typename)
 
#define AssertVariableIsOfTypeMacro(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)    ((underlying_type) (expr))
 
#define unvolatize(underlying_type, expr)    ((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
 

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 uint8 bits8
 
typedef uint16 bits16
 
typedef uint32 bits32
 
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 bytea
 
typedef struct varlena text
 
typedef struct varlena BpChar
 
typedef struct varlena VarChar
 
typedef struct nameData NameData
 
typedef NameData * Name
 
typedef struct PGAlignedBlock PGAlignedBlock
 
typedef struct PGIOAlignedBlock PGIOAlignedBlock
 
typedef struct PGAlignedXLogBlock PGAlignedXLogBlock
 
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 1174 of file c.h.

◆ __has_attribute

#define __has_attribute (   attribute)    0

Definition at line 125 of file c.h.

◆ Assert

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

Definition at line 873 of file c.h.

◆ AssertMacro

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

Definition at line 874 of file c.h.

◆ AssertPointerAlignment

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

Definition at line 908 of file c.h.

944 { static_assert(condition, errmessage); } while(0)
945#ifdef HAVE_STATEMENT_EXPRESSIONS
946#define StaticAssertExpr(condition, errmessage) \
947 ((void) ({ static_assert(condition, errmessage); true; }))
948#else
949#define StaticAssertExpr(condition, errmessage) \
950 ((void) sizeof(struct { int static_assert_failure : (condition) ? 1 : -1; }))
951#endif /* HAVE_STATEMENT_EXPRESSIONS */
952
953
954/*
955 * Compile-time checks that a variable (or expression) has the specified type.
956 *
957 * AssertVariableIsOfType() can be used as a statement.
958 * AssertVariableIsOfTypeMacro() is intended for use in macros, eg
959 * #define foo(x) (AssertVariableIsOfTypeMacro(x, int), bar(x))
960 *
961 * If we don't have __builtin_types_compatible_p, we can still assert that
962 * the types have the same size. This is far from ideal (especially on 32-bit
963 * platforms) but it provides at least some coverage.
964 */
965#ifdef HAVE__BUILTIN_TYPES_COMPATIBLE_P
966#define AssertVariableIsOfType(varname, typename) \
967 StaticAssertStmt(__builtin_types_compatible_p(__typeof__(varname), typename), \
968 CppAsString(varname) " does not have type " CppAsString(typename))
969#define AssertVariableIsOfTypeMacro(varname, typename) \
970 (StaticAssertExpr(__builtin_types_compatible_p(__typeof__(varname), typename), \
971 CppAsString(varname) " does not have type " CppAsString(typename)))
972#else /* !HAVE__BUILTIN_TYPES_COMPATIBLE_P */
973#define AssertVariableIsOfType(varname, typename) \
974 StaticAssertStmt(sizeof(varname) == sizeof(typename), \
975 CppAsString(varname) " does not have type " CppAsString(typename))
976#define AssertVariableIsOfTypeMacro(varname, typename) \
977 (StaticAssertExpr(sizeof(varname) == sizeof(typename), \
978 CppAsString(varname) " does not have type " CppAsString(typename)))
979#endif /* HAVE__BUILTIN_TYPES_COMPATIBLE_P */
980
981
982/* ----------------------------------------------------------------
983 * Section 7: widely useful macros
984 * ----------------------------------------------------------------
985 */
986/*
987 * Max
988 * Return the maximum of two numbers.
989 */
990#define Max(x, y) ((x) > (y) ? (x) : (y))
991
992/*
993 * Min
994 * Return the minimum of two numbers.
995 */
996#define Min(x, y) ((x) < (y) ? (x) : (y))
997
998
999/* Get a bit mask of the bits set in non-size_t aligned addresses */
1000#define SIZE_T_ALIGN_MASK (sizeof(size_t) - 1)
1001
1002/*
1003 * MemSet
1004 * Exactly the same as standard library function memset(), but considerably
1005 * faster for zeroing small size_t-aligned structures (such as parsetree
1006 * nodes). This has to be a macro because the main point is to avoid
1007 * function-call overhead. However, we have also found that the loop is
1008 * faster than native libc memset() on some platforms, even those with
1009 * assembler memset() functions. More research needs to be done, perhaps
1010 * with MEMSET_LOOP_LIMIT tests in configure.
1011 */
1012#define MemSet(start, val, len) \
1013 do \
1014 { \
1015 /* must be void* because we don't know if it is size_t aligned yet */ \
1016 void *_vstart = (void *) (start); \
1017 int _val = (val); \
1018 Size _len = (len); \
1019\
1020 if ((((uintptr_t) _vstart) & SIZE_T_ALIGN_MASK) == 0 && \
1021 (_len & SIZE_T_ALIGN_MASK) == 0 && \
1022 _val == 0 && \
1023 _len <= MEMSET_LOOP_LIMIT && \
1024 /* \
1025 * If MEMSET_LOOP_LIMIT == 0, optimizer should find \
1026 * the whole "if" false at compile time. \
1027 */ \
1028 MEMSET_LOOP_LIMIT != 0) \
1029 { \
1030 size_t *_start = (size_t *) _vstart; \
1031 size_t *_stop = (size_t *) ((char *) _start + _len); \
1032 while (_start < _stop) \
1033 *_start++ = 0; \
1034 } \
1035 else \
1036 memset(_vstart, _val, _len); \
1037 } while (0)
1038
1039/*
1040 * MemSetAligned is the same as MemSet except it omits the test to see if
1041 * "start" is size_t-aligned. This is okay to use if the caller knows
1042 * a-priori that the pointer is suitably aligned (typically, because he just
1043 * got it from palloc(), which always delivers a max-aligned pointer).
1044 */
1045#define MemSetAligned(start, val, len) \
1046 do \
1047 { \
1048 size_t *_start = (size_t *) (start); \
1049 int _val = (val); \
1050 Size _len = (len); \
1051\
1052 if ((_len & SIZE_T_ALIGN_MASK) == 0 && \
1053 _val == 0 && \
1054 _len <= MEMSET_LOOP_LIMIT && \
1055 MEMSET_LOOP_LIMIT != 0) \
1056 { \
1057 size_t *_stop = (size_t *) ((char *) _start + _len); \
1058 while (_start < _stop) \
1059 *_start++ = 0; \
1060 } \
1061 else \
1062 memset(_start, _val, _len); \
1063 } while (0)
1064
1065
1066/*
1067 * Macros for range-checking float values before converting to integer.
1068 * We must be careful here that the boundary values are expressed exactly
1069 * in the float domain. PG_INTnn_MIN is an exact power of 2, so it will
1070 * be represented exactly; but PG_INTnn_MAX isn't, and might get rounded
1071 * off, so avoid using that.
1072 * The input must be rounded to an integer beforehand, typically with rint(),
1073 * else we might draw the wrong conclusion about close-to-the-limit values.
1074 * These macros will do the right thing for Inf, but not necessarily for NaN,
1075 * so check isnan(num) first if that's a possibility.
1076 */
1077#define FLOAT4_FITS_IN_INT16(num) \
1078 ((num) >= (float4) PG_INT16_MIN && (num) < -((float4) PG_INT16_MIN))
1079#define FLOAT4_FITS_IN_INT32(num) \
1080 ((num) >= (float4) PG_INT32_MIN && (num) < -((float4) PG_INT32_MIN))
1081#define FLOAT4_FITS_IN_INT64(num) \
1082 ((num) >= (float4) PG_INT64_MIN && (num) < -((float4) PG_INT64_MIN))
1083#define FLOAT8_FITS_IN_INT16(num) \
1084 ((num) >= (float8) PG_INT16_MIN && (num) < -((float8) PG_INT16_MIN))
1085#define FLOAT8_FITS_IN_INT32(num) \
1086 ((num) >= (float8) PG_INT32_MIN && (num) < -((float8) PG_INT32_MIN))
1087#define FLOAT8_FITS_IN_INT64(num) \
1088 ((num) >= (float8) PG_INT64_MIN && (num) < -((float8) PG_INT64_MIN))
1089
1090
1091/* ----------------------------------------------------------------
1092 * Section 8: random stuff
1093 * ----------------------------------------------------------------
1094 */
1095
1096/*
1097 * Invert the sign of a qsort-style comparison result, ie, exchange negative
1098 * and positive integer values, being careful not to get the wrong answer
1099 * for INT_MIN. The argument should be an integral variable.
1100 */
1101#define INVERT_COMPARE_RESULT(var) \
1102 ((var) = ((var) < 0) ? 1 : -(var))
1103
1104/*
1105 * Use this, not "char buf[BLCKSZ]", to declare a field or local variable
1106 * holding a page buffer, if that page might be accessed as a page. Otherwise
1107 * the variable might be under-aligned, causing problems on alignment-picky
1108 * hardware.
1109 */
1110typedef struct PGAlignedBlock
1111{
1112 alignas(MAXIMUM_ALIGNOF) char data[BLCKSZ];
1113} PGAlignedBlock;
1114
1115/*
1116 * alignas with extended alignments is buggy in g++ < 9. As a simple
1117 * workaround, we disable these definitions in that case.
1118 *
1119 * <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89357>
1120 */
1121#if !(defined(__cplusplus) && defined(__GNUC__) && !defined(__clang__) && __GNUC__ < 9)
1122
1123/*
1124 * Use this to declare a field or local variable holding a page buffer, if that
1125 * page might be accessed as a page or passed to an SMgr I/O function. If
1126 * allocating using the MemoryContext API, the aligned allocation functions
1127 * should be used with PG_IO_ALIGN_SIZE. This alignment may be more efficient
1128 * for I/O in general, but may be strictly required on some platforms when
1129 * using direct I/O.
1130 */
1131typedef struct PGIOAlignedBlock
1132{
1133 alignas(PG_IO_ALIGN_SIZE) char data[BLCKSZ];
1134} PGIOAlignedBlock;
1135
1136/* Same, but for an XLOG_BLCKSZ-sized buffer */
1137typedef struct PGAlignedXLogBlock
1138{
1139 alignas(PG_IO_ALIGN_SIZE) char data[XLOG_BLCKSZ];
1140} PGAlignedXLogBlock;
1141
1142#endif /* !(g++ < 9) */
1143
1144/* msb for char */
1145#define HIGHBIT (0x80)
1146#define IS_HIGHBIT_SET(ch) ((unsigned char)(ch) & HIGHBIT)
1147
1148/*
1149 * Support macros for escaping strings. escape_backslash should be true
1150 * if generating a non-standard-conforming string. Prefixing a string
1151 * with ESCAPE_STRING_SYNTAX guarantees it is non-standard-conforming.
1152 * Beware of multiple evaluation of the "ch" argument!
1153 */
1154#define SQL_STR_DOUBLE(ch, escape_backslash) \
1155 ((ch) == '\'' || ((ch) == '\\' && (escape_backslash)))
1156
1157#define ESCAPE_STRING_SYNTAX 'E'
1158
1159
1160#define STATUS_OK (0)
1161#define STATUS_ERROR (-1)
1162#define STATUS_EOF (-2)
1163
1164/*
1165 * gettext support
1166 */
1167
1168#ifndef ENABLE_NLS
1169/* stuff we'd otherwise get from <libintl.h> */
1170#define gettext(x) (x)
1171#define dgettext(d,x) (x)
1172#define ngettext(s,p,n) ((n) == 1 ? (s) : (p))
1173#define dngettext(d,s,p,n) ((n) == 1 ? (s) : (p))
1174#endif
1175
1176#define _(x) gettext(x)
1177
1178/*
1179 * Use this to mark string constants as needing translation at some later
1180 * time, rather than immediately. This is useful for cases where you need
1181 * access to the original string and translated string, and for cases where
1182 * immediate translation is not possible, like when initializing global
1183 * variables.
1184 *
1185 * https://www.gnu.org/software/gettext/manual/html_node/Special-cases.html
1186 */
1187#define gettext_noop(x) (x)
1188
1189/*
1190 * To better support parallel installations of major PostgreSQL
1191 * versions as well as parallel installations of major library soname
1192 * versions, we mangle the gettext domain name by appending those
1193 * version numbers. The coding rule ought to be that wherever the
1194 * domain name is mentioned as a literal, it must be wrapped into
1195 * PG_TEXTDOMAIN(). The macros below do not work on non-literals; but
1196 * that is somewhat intentional because it avoids having to worry
1197 * about multiple states of premangling and postmangling as the values
1198 * are being passed around.
1199 *
1200 * Make sure this matches the installation rules in nls-global.mk.
1201 */
1202#ifdef SO_MAJOR_VERSION
1203#define PG_TEXTDOMAIN(domain) (domain CppAsString2(SO_MAJOR_VERSION) "-" PG_MAJORVERSION)
1204#else
1205#define PG_TEXTDOMAIN(domain) (domain "-" PG_MAJORVERSION)
1206#endif
1207
1208/*
1209 * Macro that allows to cast constness and volatile away from an expression, but doesn't
1210 * allow changing the underlying type. Enforcement of the latter
1211 * currently only works for gcc like compilers.
1212 *
1213 * Please note IT IS NOT SAFE to cast constness away if the result will ever
1214 * be modified (it would be undefined behaviour). Doing so anyway can cause
1215 * compiler misoptimizations or runtime crashes (modifying readonly memory).
1216 * It is only safe to use when the result will not be modified, but API
1217 * design or language restrictions prevent you from declaring that
1218 * (e.g. because a function returns both const and non-const variables).
1219 *
1220 * Note that this only works in function scope, not for global variables (it'd
1221 * be nice, but not trivial, to improve that).
1222 */
1223#if defined(__cplusplus)
1224#define unconstify(underlying_type, expr) const_cast<underlying_type>(expr)
1225#define unvolatize(underlying_type, expr) const_cast<underlying_type>(expr)
1226#elif defined(HAVE__BUILTIN_TYPES_COMPATIBLE_P)
1227#define unconstify(underlying_type, expr) \
1228 (StaticAssertExpr(__builtin_types_compatible_p(__typeof(expr), const underlying_type), \
1229 "wrong cast"), \
1230 (underlying_type) (expr))
1231#define unvolatize(underlying_type, expr) \
1232 (StaticAssertExpr(__builtin_types_compatible_p(__typeof(expr), volatile underlying_type), \
1233 "wrong cast"), \
1234 (underlying_type) (expr))
1235#else
1236#define unconstify(underlying_type, expr) \
1237 ((underlying_type) (expr))
1238#define unvolatize(underlying_type, expr) \
1239 ((underlying_type) (expr))
1240#endif
1241
1242/*
1243 * SSE2 instructions are part of the spec for the 64-bit x86 ISA. We assume
1244 * that compilers targeting this architecture understand SSE2 intrinsics.
1245 */
1246#if (defined(__x86_64__) || defined(_M_AMD64))
1247#define USE_SSE2
1248
1249/*
1250 * We use the Neon instructions if the compiler provides access to them (as
1251 * indicated by __ARM_NEON) and we are on aarch64. While Neon support is
1252 * technically optional for aarch64, it appears that all available 64-bit
1253 * hardware does have it. Neon exists in some 32-bit hardware too, but we
1254 * could not realistically use it there without a run-time check, which seems
1255 * not worth the trouble for now.
1256 */
1257#elif defined(__aarch64__) && defined(__ARM_NEON)
1258#define USE_NEON
1259#endif
1260
1261/* ----------------------------------------------------------------
1262 * Section 9: system-specific hacks
1263 *
1264 * This should be limited to things that absolutely have to be
1265 * included in every source file. The port-specific header file
1266 * is usually a better place for this sort of thing.
1267 * ----------------------------------------------------------------
1268 */
1269
1270/*
1271 * NOTE: this is also used for opening text files.
1272 * WIN32 treats Control-Z as EOF in files opened in text mode.
1273 * Therefore, we open files in binary mode on Win32 so we can read
1274 * literal control-Z. The other affect is that we see CRLF, but
1275 * that is OK because we can already handle those cleanly.
1276 */
1277#if defined(WIN32) || defined(__CYGWIN__)
1278#define PG_BINARY O_BINARY
1279#define PG_BINARY_A "ab"
1280#define PG_BINARY_R "rb"
1281#define PG_BINARY_W "wb"
1282#else
1283#define PG_BINARY 0
1284#define PG_BINARY_A "a"
1285#define PG_BINARY_R "r"
1286#define PG_BINARY_W "w"
1287#endif
1288
1289/*
1290 * Provide prototypes for routines not present in a particular machine's
1291 * standard C library.
1292 */
1293
1294#if !HAVE_DECL_FDATASYNC
1295extern int fdatasync(int fd);
1296#endif
1297
1298/*
1299 * Thin wrappers that convert strings to exactly 64-bit integers, matching our
1300 * definition of int64. (For the naming, compare that POSIX has
1301 * strtoimax()/strtoumax() which return intmax_t/uintmax_t.)
1302 */
1303#if SIZEOF_LONG == 8
1304#define strtoi64(str, endptr, base) ((int64) strtol(str, endptr, base))
1305#define strtou64(str, endptr, base) ((uint64) strtoul(str, endptr, base))
1306#elif SIZEOF_LONG_LONG == 8
1307#define strtoi64(str, endptr, base) ((int64) strtoll(str, endptr, base))
1308#define strtou64(str, endptr, base) ((uint64) strtoull(str, endptr, base))
1309#else
1310#error "cannot find integer type of the same size as int64_t"
1311#endif
1312
1313/*
1314 * Similarly, wrappers around labs()/llabs() matching our int64.
1315 */
1316#if SIZEOF_LONG == 8
1317#define i64abs(i) ((int64) labs(i))
1318#elif SIZEOF_LONG_LONG == 8
1319#define i64abs(i) ((int64) llabs(i))
1320#else
1321#error "cannot find integer type of the same size as int64_t"
1322#endif
1323
1324/*
1325 * Use "extern PGDLLIMPORT ..." to declare variables that are defined
1326 * in the core backend and need to be accessible by loadable modules.
1327 * No special marking is required on most ports.
1328 */
1329#ifndef PGDLLIMPORT
1330#define PGDLLIMPORT
1331#endif
1332
1333/*
1334 * Use "extern PGDLLEXPORT ..." to declare functions that are defined in
1335 * loadable modules and need to be callable by the core backend or other
1336 * loadable modules.
1337 * If the compiler knows __attribute__((visibility("*"))), we use that,
1338 * unless we already have a platform-specific definition. Otherwise,
1339 * no special marking is required.
1340 */
1341#ifndef PGDLLEXPORT
1342#ifdef HAVE_VISIBILITY_ATTRIBUTE
1343#define PGDLLEXPORT __attribute__((visibility("default")))
1344#else
1345#define PGDLLEXPORT
1346#endif
1347#endif
1348
1349/*
1350 * The following is used as the arg list for signal handlers. Any ports
1351 * that take something other than an int argument should override this in
1352 * their pg_config_os.h file. Note that variable names are required
1353 * because it is used in both the prototypes as well as the definitions.
1354 * Note also the long name. We expect that this won't collide with
1355 * other names causing compiler warnings.
1356 */
1357
1358#ifndef SIGNAL_ARGS
1359#define SIGNAL_ARGS int postgres_signal_arg
1360#endif
1361
1362/*
1363 * When there is no sigsetjmp, its functionality is provided by plain
1364 * setjmp. We now support the case only on Windows. However, it seems
1365 * that MinGW-64 has some longstanding issues in its setjmp support,
1366 * so on that toolchain we cheat and use gcc's builtins.
1367 */
1368#ifdef WIN32
1369#ifdef __MINGW64__
1370typedef intptr_t sigjmp_buf[5];
1371#define sigsetjmp(x,y) __builtin_setjmp(x)
1372#define siglongjmp __builtin_longjmp
1373#else /* !__MINGW64__ */
1374#define sigjmp_buf jmp_buf
1375#define sigsetjmp(x,y) setjmp(x)
1376#define siglongjmp longjmp
1377#endif /* __MINGW64__ */
1378#endif /* WIN32 */
1379
1380/* /port compatibility functions */
1381#include "port.h"
1382
1383/*
1384 * char16_t and char32_t
1385 * Unicode code points.
1386 *
1387 * uchar.h should always be available in C11, but it's not available on
1388 * Mac. However, these types are keywords in C++11, so when using C++, we
1389 * can't redefine the types.
1390 *
1391 * XXX: when uchar.h is available everywhere, we can remove this check and
1392 * just include uchar.h unconditionally.
1393 *
1394 * XXX: this section is out of place because uchar.h needs to be included
1395 * after port.h, due to an interaction with win32_port.h in some cases.
1396 */
1397#ifdef HAVE_UCHAR_H
1398#include <uchar.h>
1399#else
1400#ifndef __cplusplus
1401typedef uint16_t char16_t;
1402typedef uint32_t char32_t;
1403#endif
1404#endif
1405
1406/* IWYU pragma: end_exports */
1407
1408#endif /* C_H */
fdatasync
int fdatasync(int fd)
Definition win32fdatasync.c:23
char16_t
uint16_t char16_t
Definition c.h:1399
char32_t
uint32_t char32_t
Definition c.h:1400
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:1110
PGAlignedXLogBlock::data
char data[XLOG_BLCKSZ]
Definition c.h:1137
PGIOAlignedBlock::data
char data[BLCKSZ]
Definition c.h:1131

◆ AssertVariableIsOfType

#define AssertVariableIsOfType (   varname,
  typename 
)
Value:
StaticAssertStmt(sizeof(varname) == sizeof(typename), \
CppAsString(varname) " does not have type " CppAsString(typename))
CppAsString
#define CppAsString(identifier)
Definition c.h:427
StaticAssertStmt
#define StaticAssertStmt(condition, errmessage)
Definition c.h:944

Definition at line 974 of file c.h.

◆ AssertVariableIsOfTypeMacro

#define AssertVariableIsOfTypeMacro (   varname,
  typename 
)
Value:
(StaticAssertExpr(sizeof(varname) == sizeof(typename), \
CppAsString(varname) " does not have type " CppAsString(typename)))
StaticAssertExpr
#define StaticAssertExpr(condition, errmessage)
Definition c.h:950

Definition at line 977 of file c.h.

◆ BoolIsValid

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

Definition at line 776 of file c.h.

◆ BUFFERALIGN

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

Definition at line 828 of file c.h.

◆ BUFFERALIGN_DOWN

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

Definition at line 839 of file c.h.

◆ CACHELINEALIGN

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

Definition at line 829 of file c.h.

◆ CppAsString

#define CppAsString (   identifier)    #identifier

Definition at line 427 of file c.h.

◆ CppAsString2

#define CppAsString2 (   x)    CppAsString(x)

Definition at line 428 of file c.h.

◆ CppConcat

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

Definition at line 429 of file c.h.

◆ dgettext

#define dgettext (   d,
  x 
)    (x)

Definition at line 1169 of file c.h.

◆ dngettext

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

Definition at line 1171 of file c.h.

◆ DOUBLEALIGN

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

Definition at line 825 of file c.h.

◆ DOUBLEALIGN_DOWN

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

Definition at line 837 of file c.h.

◆ ESCAPE_STRING_SYNTAX

#define ESCAPE_STRING_SYNTAX   'E'

Definition at line 1155 of file c.h.

◆ FirstCommandId

#define FirstCommandId   ((CommandId) 0)

Definition at line 682 of file c.h.

◆ FLEXIBLE_ARRAY_MEMBER

#define FLEXIBLE_ARRAY_MEMBER   /* empty */

Definition at line 480 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 1075 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 1077 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 1079 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 1081 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 1083 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 1085 of file c.h.

◆ FLOAT8PASSBYVAL

#define FLOAT8PASSBYVAL   true

Definition at line 650 of file c.h.

◆ gettext

#define gettext (   x)    (x)

Definition at line 1168 of file c.h.

◆ gettext_noop

#define gettext_noop (   x)    (x)

Definition at line 1185 of file c.h.

◆ HAVE_INT64_TIMESTAMP

#define HAVE_INT64_TIMESTAMP

Definition at line 613 of file c.h.

◆ HIGHBIT

#define HIGHBIT   (0x80)

Definition at line 1143 of file c.h.

◆ INT64_FORMAT

#define INT64_FORMAT   "%" PRId64

Definition at line 564 of file c.h.

◆ INT64CONST

#define INT64CONST (   x)    INT64_C(x)

Definition at line 560 of file c.h.

◆ INTALIGN

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

Definition at line 823 of file c.h.

◆ INTALIGN_DOWN

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

Definition at line 835 of file c.h.

◆ InvalidCommandId

#define InvalidCommandId   (~(CommandId)0)

Definition at line 683 of file c.h.

◆ InvalidOid8

#define InvalidOid8   ((Oid8) 0)

Definition at line 688 of file c.h.

◆ InvalidSubTransactionId

#define InvalidSubTransactionId   ((SubTransactionId) 0)

Definition at line 672 of file c.h.

◆ INVERT_COMPARE_RESULT

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

Definition at line 1099 of file c.h.

◆ IS_HIGHBIT_SET

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

Definition at line 1144 of file c.h.

◆ lengthof

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

Definition at line 803 of file c.h.

◆ likely

#define likely (   x)    ((x) != 0)

Definition at line 411 of file c.h.

◆ LONGALIGN

#define LONGALIGN (   LEN)    TYPEALIGN(ALIGNOF_LONG, (LEN))

Definition at line 824 of file c.h.

◆ LONGALIGN_DOWN

#define LONGALIGN_DOWN (   LEN)    TYPEALIGN_DOWN(ALIGNOF_LONG, (LEN))

Definition at line 836 of file c.h.

◆ Max

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

Definition at line 991 of file c.h.

◆ MAXALIGN

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

Definition at line 826 of file c.h.

◆ MAXALIGN64

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

Definition at line 851 of file c.h.

◆ MAXALIGN_DOWN

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

Definition at line 838 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:1001
Size
size_t Size
Definition c.h:619
start
return str start
Definition hashfn_unstable.h:289
val
long val
Definition informix.c:689
len
const void size_t len
Definition pg_crc32c_sse42.c:28

Definition at line 1013 of file c.h.

1015 { \
1016 /* must be void* because we don't know if it is size_t aligned yet */ \
1017 void *_vstart = (void *) (start); \
1018 int _val = (val); \
1019 Size _len = (len); \
1020\
1021 if ((((uintptr_t) _vstart) & SIZE_T_ALIGN_MASK) == 0 && \
1022 (_len & SIZE_T_ALIGN_MASK) == 0 && \
1023 _val == 0 && \
1024 _len <= MEMSET_LOOP_LIMIT && \
1025 /* \
1026 * If MEMSET_LOOP_LIMIT == 0, optimizer should find \
1027 * the whole "if" false at compile time. \
1028 */ \
1029 MEMSET_LOOP_LIMIT != 0) \
1030 { \
1031 size_t *_start = (size_t *) _vstart; \
1032 size_t *_stop = (size_t *) ((char *) _start + _len); \
1033 while (_start < _stop) \
1034 *_start++ = 0; \
1035 } \

◆ 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 1043 of file c.h.

1048 { \
1049 size_t *_start = (size_t *) (start); \
1050 int _val = (val); \
1051 Size _len = (len); \
1052\
1053 if ((_len & SIZE_T_ALIGN_MASK) == 0 && \
1054 _val == 0 && \
1055 _len <= MEMSET_LOOP_LIMIT && \
1056 MEMSET_LOOP_LIMIT != 0) \
1057 { \
1058 size_t *_stop = (size_t *) ((char *) _start + _len); \
1059 while (_start < _stop) \
1060 *_start++ = 0; \
1061 } \

◆ Min

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

Definition at line 997 of file c.h.

◆ NameStr

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

Definition at line 765 of file c.h.

◆ ngettext

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

Definition at line 1170 of file c.h.

◆ OffsetToPointer

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

Definition at line 785 of file c.h.

◆ OID8_FORMAT

#define OID8_FORMAT   "%" PRIu64

Definition at line 566 of file c.h.

◆ OID8_MAX

#define OID8_MAX   UINT64_MAX

Definition at line 689 of file c.h.

◆ Oid8IsValid

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

Definition at line 790 of file c.h.

◆ OidIsValid

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

Definition at line 788 of file c.h.

◆ pg_assume

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

Definition at line 397 of file c.h.

◆ pg_attribute_always_inline

#define pg_attribute_always_inline   inline

Definition at line 279 of file c.h.

◆ pg_attribute_cold

#define pg_attribute_cold

Definition at line 320 of file c.h.

◆ pg_attribute_format_arg

#define pg_attribute_format_arg (   a)

Definition at line 241 of file c.h.

◆ pg_attribute_hot

#define pg_attribute_hot

Definition at line 326 of file c.h.

◆ pg_attribute_no_sanitize_address

#define pg_attribute_no_sanitize_address ( )

Definition at line 177 of file c.h.

◆ pg_attribute_no_sanitize_alignment

#define pg_attribute_no_sanitize_alignment ( )

Definition at line 189 of file c.h.

◆ pg_attribute_nonnull

#define pg_attribute_nonnull (   ...)

Definition at line 200 of file c.h.

◆ pg_attribute_printf

#define pg_attribute_printf (   f,
  a 
)

Definition at line 242 of file c.h.

◆ pg_attribute_target

#define pg_attribute_target (   ...)

Definition at line 212 of file c.h.

◆ pg_attribute_unused

#define pg_attribute_unused ( )

Definition at line 132 of file c.h.

◆ PG_BINARY

#define PG_BINARY   0

Definition at line 1281 of file c.h.

◆ PG_BINARY_A

#define PG_BINARY_A   "a"

Definition at line 1282 of file c.h.

◆ PG_BINARY_R

#define PG_BINARY_R   "r"

Definition at line 1283 of file c.h.

◆ PG_BINARY_W

#define PG_BINARY_W   "w"

Definition at line 1284 of file c.h.

◆ PG_INT16_MAX

#define PG_INT16_MAX   INT16_MAX

Definition at line 600 of file c.h.

◆ PG_INT16_MIN

#define PG_INT16_MIN   INT16_MIN

Definition at line 599 of file c.h.

◆ PG_INT32_MAX

#define PG_INT32_MAX   INT32_MAX

Definition at line 603 of file c.h.

◆ PG_INT32_MIN

#define PG_INT32_MIN   INT32_MIN

Definition at line 602 of file c.h.

◆ PG_INT64_MAX

#define PG_INT64_MAX   INT64_MAX

Definition at line 606 of file c.h.

◆ PG_INT64_MIN

#define PG_INT64_MIN   INT64_MIN

Definition at line 605 of file c.h.

◆ PG_INT8_MAX

#define PG_INT8_MAX   INT8_MAX

Definition at line 597 of file c.h.

◆ PG_INT8_MIN

#define PG_INT8_MIN   INT8_MIN

Definition at line 596 of file c.h.

◆ pg_nodiscard

#define pg_nodiscard

Definition at line 144 of file c.h.

◆ pg_noinline

#define pg_noinline

Definition at line 295 of file c.h.

◆ pg_noreturn

#define pg_noreturn

Definition at line 164 of file c.h.

◆ PG_PRINTF_ATTRIBUTE

#define PG_PRINTF_ATTRIBUTE   PG_C_PRINTF_ATTRIBUTE

Definition at line 231 of file c.h.

◆ PG_TEXTDOMAIN

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

Definition at line 1203 of file c.h.

◆ PG_UINT16_MAX

#define PG_UINT16_MAX   UINT16_MAX

Definition at line 601 of file c.h.

◆ PG_UINT32_MAX

#define PG_UINT32_MAX   UINT32_MAX

Definition at line 604 of file c.h.

◆ PG_UINT64_MAX

#define PG_UINT64_MAX   UINT64_MAX

Definition at line 607 of file c.h.

◆ PG_UINT8_MAX

#define PG_UINT8_MAX   UINT8_MAX

Definition at line 598 of file c.h.

◆ pg_unreachable

#define pg_unreachable ( )    abort()

Definition at line 341 of file c.h.

◆ PG_USED_FOR_ASSERTS_ONLY

#define PG_USED_FOR_ASSERTS_ONLY   pg_attribute_unused()

Definition at line 223 of file c.h.

◆ PGDLLEXPORT

#define PGDLLEXPORT

Definition at line 1343 of file c.h.

◆ PGDLLIMPORT

#define PGDLLIMPORT

Definition at line 1328 of file c.h.

◆ PointerIsAligned

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

Definition at line 782 of file c.h.

◆ RegProcedureIsValid

#define RegProcedureIsValid (   p)    OidIsValid(p)

Definition at line 792 of file c.h.

◆ SHORTALIGN

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

Definition at line 822 of file c.h.

◆ SHORTALIGN_DOWN

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

Definition at line 834 of file c.h.

◆ SIGNAL_ARGS

#define SIGNAL_ARGS   int postgres_signal_arg

Definition at line 1357 of file c.h.

◆ SIZE_T_ALIGN_MASK

#define SIZE_T_ALIGN_MASK   (sizeof(size_t) - 1)

Definition at line 1001 of file c.h.

◆ SQL_STR_DOUBLE

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

Definition at line 1152 of file c.h.

◆ StaticAssertDecl

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

Definition at line 942 of file c.h.

◆ StaticAssertExpr

#define StaticAssertExpr (   condition,
  errmessage 
)     ((void) sizeof(struct { int static_assert_failure : (condition) ? 1 : -1; }))

Definition at line 950 of file c.h.

951 { int static_assert_failure : (condition) ? 1 : -1; }))

◆ StaticAssertStmt

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

Definition at line 944 of file c.h.

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

◆ STATUS_EOF

#define STATUS_EOF   (-2)

Definition at line 1160 of file c.h.

◆ STATUS_ERROR

#define STATUS_ERROR   (-1)

Definition at line 1159 of file c.h.

◆ STATUS_OK

#define STATUS_OK   (0)

Definition at line 1158 of file c.h.

◆ TopSubTransactionId

#define TopSubTransactionId   ((SubTransactionId) 1)

Definition at line 673 of file c.h.

◆ TYPEALIGN

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

Definition at line 819 of file c.h.

◆ TYPEALIGN64

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

Definition at line 847 of file c.h.

◆ TYPEALIGN_DOWN

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

Definition at line 831 of file c.h.

◆ UINT64_FORMAT

#define UINT64_FORMAT   "%" PRIu64

Definition at line 565 of file c.h.

◆ UINT64CONST

#define UINT64CONST (   x)    UINT64_C(x)

Definition at line 561 of file c.h.

◆ unconstify

#define unconstify (   underlying_type,
  expr 
)     ((underlying_type) (expr))

Definition at line 1234 of file c.h.

◆ unlikely

#define unlikely (   x)    ((x) != 0)

Definition at line 412 of file c.h.

◆ unvolatize

#define unvolatize (   underlying_type,
  expr 
)     ((underlying_type) (expr))

Definition at line 1236 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:455

Definition at line 445 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 455 of file c.h.

◆ VARHDRSZ

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

Definition at line 711 of file c.h.

Typedef Documentation

◆ bits16

typedef uint16 bits16

Definition at line 554 of file c.h.

◆ bits32

typedef uint32 bits32

Definition at line 555 of file c.h.

◆ bits8

typedef uint8 bits8

Definition at line 553 of file c.h.

◆ BpChar

typedef struct varlena BpChar

Definition at line 720 of file c.h.

◆ bytea

typedef struct varlena bytea

Definition at line 718 of file c.h.

◆ char16_t

typedef uint16_t char16_t

Definition at line 1399 of file c.h.

◆ char32_t

typedef uint32_t char32_t

Definition at line 1400 of file c.h.

◆ CommandId

typedef uint32 CommandId

Definition at line 680 of file c.h.

◆ float4

typedef float float4

Definition at line 643 of file c.h.

◆ float8

typedef double float8

Definition at line 644 of file c.h.

◆ Index

typedef unsigned int Index

Definition at line 628 of file c.h.

◆ int16

typedef int16_t int16

Definition at line 541 of file c.h.

◆ int32

typedef int32_t int32

Definition at line 542 of file c.h.

◆ int64

typedef int64_t int64

Definition at line 543 of file c.h.

◆ int8

typedef int8_t int8

Definition at line 540 of file c.h.

◆ LocalTransactionId

typedef uint32 LocalTransactionId

Definition at line 668 of file c.h.

◆ MultiXactId

typedef TransactionId MultiXactId

Definition at line 676 of file c.h.

◆ MultiXactOffset

typedef uint64 MultiXactOffset

Definition at line 678 of file c.h.

◆ Name

typedef NameData* Name

Definition at line 763 of file c.h.

◆ NameData

typedef struct nameData NameData

◆ Offset

typedef signed int Offset

Definition at line 638 of file c.h.

◆ Oid8

typedef uint64 Oid8

Definition at line 686 of file c.h.

◆ pg_funcptr_t

typedef void(* pg_funcptr_t) (void)

Definition at line 470 of file c.h.

◆ PGAlignedBlock

typedef struct PGAlignedBlock PGAlignedBlock

◆ PGAlignedXLogBlock

typedef struct PGAlignedXLogBlock PGAlignedXLogBlock

◆ PGIOAlignedBlock

typedef struct PGIOAlignedBlock PGIOAlignedBlock

◆ Pointer

typedef void* Pointer

Definition at line 537 of file c.h.

◆ regproc

typedef Oid regproc

Definition at line 663 of file c.h.

◆ RegProcedure

typedef regproc RegProcedure

Definition at line 664 of file c.h.

◆ Size

typedef size_t Size

Definition at line 619 of file c.h.

◆ SubTransactionId

typedef uint32 SubTransactionId

Definition at line 670 of file c.h.

◆ text

typedef struct varlena text

Definition at line 719 of file c.h.

◆ TransactionId

typedef uint32 TransactionId

Definition at line 666 of file c.h.

◆ uint16

typedef uint16_t uint16

Definition at line 545 of file c.h.

◆ uint32

typedef uint32_t uint32

Definition at line 546 of file c.h.

◆ uint64

typedef uint64_t uint64

Definition at line 547 of file c.h.

◆ uint8

typedef uint8_t uint8

Definition at line 544 of file c.h.

◆ VarChar

typedef struct varlena VarChar

Definition at line 721 of file c.h.

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:803
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().