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From: Massimo Dal Zotto <dz@cs.unitn.it>

Browse Source 
> tprintf.patch
>
>       tprintf.patch
>
>       adds functions and macros which implement a conditional trace package
>       with the ability to change flags and numeric options of running
>       backends at runtime.
>       Options/flags can be specified in the command line and/or read from
>       the file pg_options in the data directory.
This commit is contained in:
Marc G. Fournier
1998-08-25 21:34:10 +00:00
parent 51e8e187d1
commit 7414d61950
9 changed files with 430 additions and 188 deletions
Download Patch File Download Diff File Expand all files Collapse all files

41
src/backend/storage/ipc/spin.c
View File

@@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/storage/ipc/Attic/spin.c,v 1.14 1998/06/27 15:47:45 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/storage/ipc/Attic/spin.c,v 1.15 1998/08/25 21:34:03 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
@@ -31,6 +31,7 @@
#include "storage/shmem.h"
#include "storage/spin.h"
#include "storage/proc.h"
#include "utils/trace.h"
#ifndef HAS_TEST_AND_SET
#include <sys/sem.h>
@@ -81,10 +82,12 @@ InitSpinLocks(int init, IPCKey key)
}
#ifdef LOCKDEBUG
#define PRINT_LOCK(LOCK) printf("(locklock = %d, flag = %d, nshlocks = %d, \
shlock = %d, exlock =%d)\n", LOCK->locklock, \
LOCK->flag, LOCK->nshlocks, LOCK->shlock, \
LOCK->exlock)
#define PRINT_LOCK(LOCK) \
TPRINTF(TRACE_SPINLOCKS, \
"(locklock = %d, flag = %d, nshlocks = %d, shlock = %d, " \
"exlock =%d)\n", LOCK->locklock, \
LOCK->flag, LOCK->nshlocks, LOCK->shlock, \
LOCK->exlock)
#endif
/* from ipc.c */
@@ -98,8 +101,7 @@ SpinAcquire(SPINLOCK lockid)
/* This used to be in ipc.c, but move here to reduce function calls */
slckP = &(SLockArray[lockid]);
#ifdef LOCKDEBUG
printf("SpinAcquire(%d)\n", lockid);
printf("IN: ");
TPRINTF(TRACE_SPINLOCKS, "SpinAcquire: %d", lockid);
PRINT_LOCK(slckP);
#endif
ex_try_again:
@@ -112,7 +114,7 @@ ex_try_again:
S_LOCK(&(slckP->shlock));
S_UNLOCK(&(slckP->locklock));
#ifdef LOCKDEBUG
printf("OUT: ");
TPRINTF(TRACE_SPINLOCKS, "OUT: ");
PRINT_LOCK(slckP);
#endif
break;
@@ -124,6 +126,9 @@ ex_try_again:
goto ex_try_again;
}
PROC_INCR_SLOCK(lockid);
#ifdef LOCKDEBUG
TPRINTF(TRACE_SPINLOCKS, "SpinAcquire: got %d", lockid);
#endif
}
void
@@ -131,13 +136,23 @@ SpinRelease(SPINLOCK lockid)
{
SLock *slckP;
PROC_DECR_SLOCK(lockid);
/* This used to be in ipc.c, but move here to reduce function calls */
slckP = &(SLockArray[lockid]);
#ifdef USE_ASSERT_CHECKING
/*
* Check that we are actually holding the lock we are releasing.
* This can be done only after MyProc has been initialized.
*/
if (MyProc)
Assert(MyProc->sLocks[lockid] > 0);
Assert(slckP->flag != NOLOCK);
#endif
PROC_DECR_SLOCK(lockid);
#ifdef LOCKDEBUG
printf("SpinRelease(%d)\n", lockid);
printf("IN: ");
TPRINTF("SpinRelease: %d\n", lockid);
PRINT_LOCK(slckP);
#endif
S_LOCK(&(slckP->locklock));
@@ -160,7 +175,7 @@ SpinRelease(SPINLOCK lockid)
S_UNLOCK(&(slckP->exlock));
S_UNLOCK(&(slckP->locklock));
#ifdef LOCKDEBUG
printf("OUT: ");
TPRINTF(TRACE_SPINLOCKS, "SpinRelease: released %d", lockid);
PRINT_LOCK(slckP);
#endif
}