From ca6c0ac4d3da974c11866388989071f5ce821b5d Mon Sep 17 00:00:00 2001 From: Magnus Hagander Date: Mon, 4 May 2009 08:36:40 +0000 Subject: [PATCH] Call SetLastError(0) before calling the file mapping functions to make sure that the error code is reset, as a precaution in case the API doesn't properly reset it on success. This could be necessary, since we check the error value even if the function doesn't fail for specific success cases. --- src/backend/port/win32_shmem.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/src/backend/port/win32_shmem.c b/src/backend/port/win32_shmem.c index b3849bea0b7..7cb477c6ed0 100644 --- a/src/backend/port/win32_shmem.c +++ b/src/backend/port/win32_shmem.c @@ -6,7 +6,7 @@ * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/port/win32_shmem.c,v 1.7 2009年01月01日 17:23:46 momjian Exp $ + * $PostgreSQL: pgsql/src/backend/port/win32_shmem.c,v 1.8 2009年05月04日 08:36:40 mha Exp $ * *------------------------------------------------------------------------- */ @@ -131,6 +131,9 @@ PGSharedMemoryCreate(Size size, bool makePrivate, int port) UsedShmemSegAddr = NULL; + /* In case CreateFileMapping() doesn't set the error code to 0 on success */ + SetLastError(0); + hmap = CreateFileMapping((HANDLE) 0xFFFFFFFF, /* Use the pagefile */ NULL, /* Default security attrs */ PAGE_READWRITE, /* Memory is Read/Write */ @@ -160,6 +163,9 @@ PGSharedMemoryCreate(Size size, bool makePrivate, int port) Sleep(1000); + /* In case CreateFileMapping() doesn't set the error code to 0 on success */ + SetLastError(0); + hmap = CreateFileMapping((HANDLE) 0xFFFFFFFF, NULL, PAGE_READWRITE, 0L, (DWORD) size, szShareMem); if (!hmap) ereport(FATAL, -- 2.39.5

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