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Create an internal semaphore API that is not tied to SysV semaphores.

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As proof of concept, provide an alternate implementation based on POSIX
semaphores.  Also push the SysV shared-memory implementation into a
separate file so that it can be replaced conveniently.
This commit is contained in:
Tom Lane
2002-05-05 00:03:29 +00:00
parent 91fc10fdac
commit 72a3902a66
37 changed files with 1659 additions and 1370 deletions
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4
src/include/storage/spin.h
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@@ -40,7 +40,7 @@
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: spin.h,v 1.19 2001/11/05 17:46:35 momjian Exp $
* $Id: spin.h,v 1.20 2002/05/05 00:03:29 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -72,6 +72,6 @@
#define SpinLockFree(lock) S_LOCK_FREE(lock)
extern void CreateSpinlocks(void);
extern int SpinlockSemas(void);
#endif /* SPIN_H */