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Commit344d0ca

Browse files
committed
Use snprintf instead of wsprintf, and use getenv("APPDATA") instead of
SHGetFolderPath.This removes the direct dependency on shell32.dll and user32.dll, whicheats a lot of "desktop heap" for each backend that's started. Thedesktop heap is a very limited resource, causing backends to nolonger start once it's been exhausted.We still have indirect depdendencies on user32.dll through third partylibraries, but those can't easily be removed.Dave Page
1 parent12f25e7 commit344d0ca

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3 files changed

+14
-10
lines changed

3 files changed

+14
-10
lines changed

‎src/backend/port/win32/signal.c‎

Lines changed: 3 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -6,7 +6,7 @@
66
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
77
*
88
* IDENTIFICATION
9-
* $PostgreSQL: pgsql/src/backend/port/win32/signal.c,v 1.18 2007/01/05 22:19:35 momjian Exp $
9+
* $PostgreSQL: pgsql/src/backend/port/win32/signal.c,v 1.19 2007/10/23 17:58:01 mha Exp $
1010
*
1111
*-------------------------------------------------------------------------
1212
*/
@@ -178,7 +178,7 @@ pgwin32_create_signal_listener(pid_t pid)
178178
charpipename[128];
179179
HANDLEpipe;
180180

181-
wsprintf(pipename,"\\\\.\\pipe\\pgsignal_%d", (int)pid);
181+
snprintf(pipename,sizeof(pipename),"\\\\.\\pipe\\pgsignal_%u", (int)pid);
182182

183183
pipe=CreateNamedPipe(pipename,PIPE_ACCESS_DUPLEX,
184184
PIPE_TYPE_MESSAGE |PIPE_READMODE_MESSAGE |PIPE_WAIT,
@@ -251,7 +251,7 @@ pg_signal_thread(LPVOID param)
251251
charpipename[128];
252252
HANDLEpipe=pgwin32_initial_signal_pipe;
253253

254-
wsprintf(pipename,"\\\\.\\pipe\\pgsignal_%d",GetCurrentProcessId());
254+
snprintf(pipename,sizeof(pipename),"\\\\.\\pipe\\pgsignal_%u",GetCurrentProcessId());
255255

256256
for (;;)
257257
{

‎src/port/kill.c‎

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -9,7 +9,7 @@
99
*signals that the backend can recognize.
1010
*
1111
* IDENTIFICATION
12-
* $PostgreSQL: pgsql/src/port/kill.c,v 1.8 2007/01/05 22:20:02 momjian Exp $
12+
* $PostgreSQL: pgsql/src/port/kill.c,v 1.9 2007/10/23 17:58:01 mha Exp $
1313
*
1414
*-------------------------------------------------------------------------
1515
*/
@@ -38,7 +38,7 @@ pgkill(int pid, int sig)
3838
errno=EINVAL;
3939
return-1;
4040
}
41-
wsprintf(pipename,"\\\\.\\pipe\\pgsignal_%i",pid);
41+
snprintf(pipename,sizeof(pipename),"\\\\.\\pipe\\pgsignal_%u",pid);
4242
if (!CallNamedPipe(pipename,&sigData,1,&sigRet,1,&bytes,1000))
4343
{
4444
if (GetLastError()==ERROR_FILE_NOT_FOUND)

‎src/port/path.c‎

Lines changed: 9 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
*
1010
* IDENTIFICATION
11-
* $PostgreSQL: pgsql/src/port/path.c,v 1.71 2007/01/05 22:20:02 momjian Exp $
11+
* $PostgreSQL: pgsql/src/port/path.c,v 1.72 2007/10/23 17:58:01 mha Exp $
1212
*
1313
*-------------------------------------------------------------------------
1414
*/
@@ -628,10 +628,14 @@ get_home_path(char *ret_path)
628628
strlcpy(ret_path,pwd->pw_dir,MAXPGPATH);
629629
return true;
630630
#else
631-
chartmppath[MAX_PATH];
632-
633-
ZeroMemory(tmppath,sizeof(tmppath));
634-
if (SHGetFolderPath(NULL,CSIDL_APPDATA,NULL,0,tmppath)!=S_OK)
631+
char*tmppath;
632+
633+
/*
634+
* Note: We use getenv here because the more modern SHGetSpecialFolderPath()
635+
* will force us to link with shell32.lib which eats valuable desktop heap.
636+
*/
637+
tmppath=getenv("APPDATA");
638+
if (!tmppath)
635639
return false;
636640
snprintf(ret_path,MAXPGPATH,"%s/postgresql",tmppath);
637641
return true;

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