diff options
Diffstat (limited to 'src/backend/storage/lmgr/proc.c')
| -rw-r--r-- | src/backend/storage/lmgr/proc.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/src/backend/storage/lmgr/proc.c b/src/backend/storage/lmgr/proc.c index f8ac4edd6ff..22b4278610c 100644 --- a/src/backend/storage/lmgr/proc.c +++ b/src/backend/storage/lmgr/proc.c @@ -645,27 +645,33 @@ GetStartupBufferPinWaitBufId(void) } /* - * Check whether there are at least N free PGPROC objects. + * Check whether there are at least N free PGPROC objects. If false is + * returned, *nfree will be set to the number of free PGPROC objects. + * Otherwise, *nfree will be set to n. * * Note: this is designed on the assumption that N will generally be small. */ bool -HaveNFreeProcs(int n) +HaveNFreeProcs(int n, int *nfree) { dlist_iter iter; + Assert(n > 0); + Assert(nfree); + SpinLockAcquire(ProcStructLock); + *nfree = 0; dlist_foreach(iter, &ProcGlobal->freeProcs) { - n--; - if (n == 0) + (*nfree)++; + if (*nfree == n) break; } SpinLockRelease(ProcStructLock); - return (n <= 0); + return (*nfree == n); } /* |