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Improve spinlock selftest to make it able to detect misdeclaration of

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the slock_t datatype (ie, declared type smaller than what the hardware
TAS instruction needs).
This commit is contained in:
Tom Lane 2004-08-30 23:47:20 +00:00
parent 17364edce6
commit 332ee2dc41
1 changed files with 44 additions and 11 deletions
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55
src/backend/storage/lmgr/s_lock.c
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@ -9,7 +9,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/lmgr/s_lock.c,v 1.31 2004/08/30 02:54:38 momjian Exp $ * $PostgreSQL: pgsql/src/backend/storage/lmgr/s_lock.c,v 1.32 2004/08/30 23:47:20 tgl Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -249,40 +249,73 @@ tas_dummy() /* really means: extern int tas(slock_t
* test program for verifying a port's spinlock support. * test program for verifying a port's spinlock support.
*/ */
volatile slock_t test_lock; struct test_lock_struct
{
char pad1;
slock_t lock;
char pad2;
};
volatile struct test_lock_struct test_lock;
int int
main() main()
{ {
srandom((unsigned int) time(NULL)); srandom((unsigned int) time(NULL));
S_INIT_LOCK(&test_lock); test_lock.pad1 = test_lock.pad2 = 0x44;
if (!S_LOCK_FREE(&test_lock)) S_INIT_LOCK(&test_lock.lock);
if (test_lock.pad1 != 0x44 || test_lock.pad2 != 0x44)
{
printf("S_LOCK_TEST: failed, declared datatype is wrong size\n");
return 1;
}
if (!S_LOCK_FREE(&test_lock.lock))
{ {
printf("S_LOCK_TEST: failed, lock not initialized\n"); printf("S_LOCK_TEST: failed, lock not initialized\n");
return 1; return 1;
} }
S_LOCK(&test_lock); S_LOCK(&test_lock.lock);
if (S_LOCK_FREE(&test_lock)) if (test_lock.pad1 != 0x44 || test_lock.pad2 != 0x44)
{
printf("S_LOCK_TEST: failed, declared datatype is wrong size\n");
return 1;
}
if (S_LOCK_FREE(&test_lock.lock))
{ {
printf("S_LOCK_TEST: failed, lock not locked\n"); printf("S_LOCK_TEST: failed, lock not locked\n");
return 1; return 1;
} }
S_UNLOCK(&test_lock); S_UNLOCK(&test_lock.lock);
if (!S_LOCK_FREE(&test_lock)) if (test_lock.pad1 != 0x44 || test_lock.pad2 != 0x44)
{
printf("S_LOCK_TEST: failed, declared datatype is wrong size\n");
return 1;
}
if (!S_LOCK_FREE(&test_lock.lock))
{ {
printf("S_LOCK_TEST: failed, lock not unlocked\n"); printf("S_LOCK_TEST: failed, lock not unlocked\n");
return 1; return 1;
} }
S_LOCK(&test_lock); S_LOCK(&test_lock.lock);
if (S_LOCK_FREE(&test_lock)) if (test_lock.pad1 != 0x44 || test_lock.pad2 != 0x44)
{
printf("S_LOCK_TEST: failed, declared datatype is wrong size\n");
return 1;
}
if (S_LOCK_FREE(&test_lock.lock))
{ {
printf("S_LOCK_TEST: failed, lock not re-locked\n"); printf("S_LOCK_TEST: failed, lock not re-locked\n");
return 1; return 1;
@ -293,7 +326,7 @@ main()
printf(" if S_LOCK() and TAS() are working.\n"); printf(" if S_LOCK() and TAS() are working.\n");
fflush(stdout); fflush(stdout);
s_lock(&test_lock, __FILE__, __LINE__); s_lock(&test_lock.lock, __FILE__, __LINE__);
printf("S_LOCK_TEST: failed, lock not locked\n"); printf("S_LOCK_TEST: failed, lock not locked\n");
return 1; return 1;