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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2002-05-05 00:03:29 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2002-05-05 00:03:29 +0000 |
| commit | 72a3902a664c7fbceb2034e28e444b28f96fa717 (patch) | |
| tree | ff42e4494af6ea1c1cdf524f3feb5fc670217f0c /src/backend/storage/ipc/ipci.c | |
| parent | 91fc10fdacfcbadc123fd9d8ee16a4568f8c636b (diff) | |
| download | postgresql-72a3902a664c7fbceb2034e28e444b28f96fa717.tar.gz postgresql-72a3902a664c7fbceb2034e28e444b28f96fa717.zip | |
Create an internal semaphore API that is not tied to SysV semaphores.
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.
Diffstat (limited to 'src/backend/storage/ipc/ipci.c')
| -rw-r--r-- | src/backend/storage/ipc/ipci.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/src/backend/storage/ipc/ipci.c b/src/backend/storage/ipc/ipci.c index c2950dc767a..34412e3ed44 100644 --- a/src/backend/storage/ipc/ipci.c +++ b/src/backend/storage/ipc/ipci.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/storage/ipc/ipci.c,v 1.46 2002/03/02 21:39:29 momjian Exp $ + * $Header: /cvsroot/pgsql/src/backend/storage/ipc/ipci.c,v 1.47 2002/05/05 00:03:28 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -21,8 +21,11 @@ #include "access/xlog.h" #include "storage/bufmgr.h" #include "storage/freespace.h" +#include "storage/ipc.h" #include "storage/lmgr.h" #include "storage/lwlock.h" +#include "storage/pg_sema.h" +#include "storage/pg_shmem.h" #include "storage/pmsignal.h" #include "storage/proc.h" #include "storage/sinval.h" @@ -41,9 +44,12 @@ * memory. This is true for a standalone backend, false for a postmaster. */ void -CreateSharedMemoryAndSemaphores(bool makePrivate, int maxBackends) +CreateSharedMemoryAndSemaphores(bool makePrivate, + int maxBackends, + int port) { int size; + int numSemas; PGShmemHeader *seghdr; /* @@ -70,12 +76,14 @@ CreateSharedMemoryAndSemaphores(bool makePrivate, int maxBackends) /* * Create the shmem segment */ - seghdr = IpcMemoryCreate(size, makePrivate, IPCProtection); + seghdr = PGSharedMemoryCreate(size, makePrivate, port); /* - * First initialize spinlocks --- needed by InitShmemAllocation() + * Create semaphores */ - CreateSpinlocks(); + numSemas = ProcGlobalSemas(maxBackends); + numSemas += SpinlockSemas(); + PGReserveSemaphores(numSemas, port); /* * Set up shared memory allocation mechanism |