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be-fsstubs.h File Reference
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Functions

int lo_read (int fd, char *buf, int len)
 
int lo_write (int fd, const char *buf, int len)
 
void AtEOXact_LargeObject (bool isCommit)
 
void AtEOSubXact_LargeObject (bool isCommit, SubTransactionId mySubid, SubTransactionId parentSubid)
 

Function Documentation

◆ AtEOSubXact_LargeObject()

void AtEOSubXact_LargeObject ( bool  isCommit,
SubTransactionId  mySubid,
SubTransactionId  parentSubid 
)

Definition at line 648 of file be-fsstubs.c.

650 {
651  int i;
652 
653  if (fscxt == NULL) /* no LO operations in this xact */
654  return;
655 
656  for (i = 0; i < cookies_size; i++)
657  {
658  LargeObjectDesc *lo = cookies[i];
659 
660  if (lo != NULL && lo->subid == mySubid)
661  {
662  if (isCommit)
663  lo->subid = parentSubid;
664  else
665  closeLOfd(i);
666  }
667  }
668 }
static MemoryContext fscxt
Definition: be-fsstubs.c:75
static void closeLOfd(int fd)
Definition: be-fsstubs.c:716
static LargeObjectDesc ** cookies
Definition: be-fsstubs.c:71
static int cookies_size
Definition: be-fsstubs.c:72
int i
Definition: isn.c:73
SubTransactionId subid
Definition: large_object.h:43

References closeLOfd(), cookies, cookies_size, fscxt, i, and LargeObjectDesc::subid.

Referenced by AbortSubTransaction(), and CommitSubTransaction().

◆ AtEOXact_LargeObject()

void AtEOXact_LargeObject ( bool  isCommit)

Definition at line 602 of file be-fsstubs.c.

603 {
604  int i;
605 
606  if (!lo_cleanup_needed)
607  return; /* no LO operations in this xact */
608 
609  /*
610  * Close LO fds and clear cookies array so that LO fds are no longer good.
611  * The memory context and resource owner holding them are going away at
612  * the end-of-transaction anyway, but on commit, we need to close them to
613  * avoid warnings about leaked resources at commit. On abort we can skip
614  * this step.
615  */
616  if (isCommit)
617  {
618  for (i = 0; i < cookies_size; i++)
619  {
620  if (cookies[i] != NULL)
621  closeLOfd(i);
622  }
623  }
624 
625  /* Needn't actually pfree since we're about to zap context */
626  cookies = NULL;
627  cookies_size = 0;
628 
629  /* Release the LO memory context to prevent permanent memory leaks. */
630  if (fscxt)
632  fscxt = NULL;
633 
634  /* Give inv_api.c a chance to clean up, too */
635  close_lo_relation(isCommit);
636 
637  lo_cleanup_needed = false;
638 }
static bool lo_cleanup_needed
Definition: be-fsstubs.c:74
void close_lo_relation(bool isCommit)
Definition: inv_api.c:99
void MemoryContextDelete(MemoryContext context)
Definition: mcxt.c:403

References close_lo_relation(), closeLOfd(), cookies, cookies_size, fscxt, i, lo_cleanup_needed, and MemoryContextDelete().

Referenced by AbortTransaction(), CommitTransaction(), and PrepareTransaction().

◆ lo_read()

int lo_read ( int  fd,
char *  buf,
int  len 
)

Definition at line 154 of file be-fsstubs.c.

155 {
156  int status;
157  LargeObjectDesc *lobj;
158 
159  if (fd < 0 || fd >= cookies_size || cookies[fd] == NULL)
160  ereport(ERROR,
161  (errcode(ERRCODE_UNDEFINED_OBJECT),
162  errmsg("invalid large-object descriptor: %d", fd)));
163  lobj = cookies[fd];
164 
165  /*
166  * Check state. inv_read() would throw an error anyway, but we want the
167  * error to be about the FD's state not the underlying privilege; it might
168  * be that the privilege exists but user forgot to ask for read mode.
169  */
170  if ((lobj->flags & IFS_RDLOCK) == 0)
171  ereport(ERROR,
172  (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
173  errmsg("large object descriptor %d was not opened for reading",
174  fd)));
175 
176  status = inv_read(lobj, buf, len);
177 
178  return status;
179 }
int errcode(int sqlerrcode)
Definition: elog.c:860
int errmsg(const char *fmt,...)
Definition: elog.c:1075
#define ERROR
Definition: elog.h:39
#define ereport(elevel,...)
Definition: elog.h:149
int inv_read(LargeObjectDesc *obj_desc, char *buf, int nbytes)
Definition: inv_api.c:489
#define IFS_RDLOCK
Definition: large_object.h:48
const void size_t len
static char * buf
Definition: pg_test_fsync.c:73
static int fd(const char *x, int i)
Definition: preproc-init.c:105

References buf, cookies, cookies_size, ereport, errcode(), errmsg(), ERROR, fd(), LargeObjectDesc::flags, IFS_RDLOCK, inv_read(), and len.

Referenced by be_loread(), dumpLOs(), exportFile(), and pickout().

◆ lo_write()

int lo_write ( int  fd,
const char *  buf,
int  len 
)

Definition at line 182 of file be-fsstubs.c.

183 {
184  int status;
185  LargeObjectDesc *lobj;
186 
187  if (fd < 0 || fd >= cookies_size || cookies[fd] == NULL)
188  ereport(ERROR,
189  (errcode(ERRCODE_UNDEFINED_OBJECT),
190  errmsg("invalid large-object descriptor: %d", fd)));
191  lobj = cookies[fd];
192 
193  /* see comment in lo_read() */
194  if ((lobj->flags & IFS_WRLOCK) == 0)
195  ereport(ERROR,
196  (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
197  errmsg("large object descriptor %d was not opened for writing",
198  fd)));
199 
200  status = inv_write(lobj, buf, len);
201 
202  return status;
203 }
int inv_write(LargeObjectDesc *obj_desc, const char *buf, int nbytes)
Definition: inv_api.c:582
#define IFS_WRLOCK
Definition: large_object.h:49

References buf, cookies, cookies_size, ereport, errcode(), errmsg(), ERROR, fd(), LargeObjectDesc::flags, IFS_WRLOCK, inv_write(), and len.

Referenced by be_lowrite(), dump_lo_buf(), importFile(), and overwrite().