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Commit6458daa

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Running lo_read/lo_write under different memory context
cause troubles. SeeMessage-Id: <199905090312.MAA00466@ext16.sra.co.jp>for more details.
1 parent202e523 commit6458daa

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1 file changed

+17
-3
lines changed

1 file changed

+17
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‎src/backend/libpq/be-fsstubs.c

Lines changed: 17 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@
77
*
88
*
99
* IDENTIFICATION
10-
* $Header: /cvsroot/pgsql/src/backend/libpq/be-fsstubs.c,v 1.30 1999/05/09 00:54:30 tgl Exp $
10+
* $Header: /cvsroot/pgsql/src/backend/libpq/be-fsstubs.c,v 1.31 1999/05/0915:00:18 ishii Exp $
1111
*
1212
* NOTES
1313
* This should be moved to a more appropriate place. It is here
@@ -131,6 +131,9 @@ lo_close(int fd)
131131
int
132132
lo_read(intfd,char*buf,intlen)
133133
{
134+
MemoryContextcurrentContext;
135+
intstatus;
136+
134137
if (fd<0||fd >=MAX_LOBJ_FDS)
135138
{
136139
elog(ERROR,"lo_read: large obj descriptor (%d) out of range",fd);
@@ -141,13 +144,20 @@ lo_read(int fd, char *buf, int len)
141144
elog(ERROR,"lo_read: invalid large obj descriptor (%d)",fd);
142145
return-3;
143146
}
147+
currentContext=MemoryContextSwitchTo((MemoryContext)fscxt);
148+
149+
status=inv_read(cookies[fd],buf,len);
144150

145-
returninv_read(cookies[fd],buf,len);
151+
MemoryContextSwitchTo(currentContext);
152+
return(status);
146153
}
147154

148155
int
149156
lo_write(intfd,char*buf,intlen)
150157
{
158+
MemoryContextcurrentContext;
159+
intstatus;
160+
151161
if (fd<0||fd >=MAX_LOBJ_FDS)
152162
{
153163
elog(ERROR,"lo_write: large obj descriptor (%d) out of range",fd);
@@ -158,8 +168,12 @@ lo_write(int fd, char *buf, int len)
158168
elog(ERROR,"lo_write: invalid large obj descriptor (%d)",fd);
159169
return-3;
160170
}
171+
currentContext=MemoryContextSwitchTo((MemoryContext)fscxt);
172+
173+
status=inv_write(cookies[fd],buf,len);
161174

162-
returninv_write(cookies[fd],buf,len);
175+
MemoryContextSwitchTo(currentContext);
176+
return(status);
163177
}
164178

165179

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