[dovecot-cvs] dovecot/src/lib istream-mmap.c,1.10,1.11
cras at procontrol.fi
cras at procontrol.fi
Sat Jun 19 23:29:10 EEST 2004
Update of /home/cvs/dovecot/src/lib
In directory talvi:/tmp/cvs-serv11594/lib
Modified Files:
istream-mmap.c
Log Message:
minor optimization
Index: istream-mmap.c
===================================================================
RCS file: /home/cvs/dovecot/src/lib/istream-mmap.c,v
retrieving revision 1.10
retrieving revision 1.11
diff -u -d -r1.10 -r1.11
--- istream-mmap.c 27 Apr 2004 20:25:53 -0000 1.10
+++ istream-mmap.c 19 Jun 2004 20:29:08 -0000 1.11
@@ -113,19 +113,25 @@
i_assert((uoff_t)mstream->mmap_offset + stream->buffer_size <=
mstream->v_size);
- mstream->mmap_base = mmap(NULL, stream->buffer_size,
- PROT_READ, MAP_PRIVATE,
- mstream->fd, mstream->mmap_offset);
- if (mstream->mmap_base == MAP_FAILED) {
- stream->istream.stream_errno = errno;
+ if (stream->buffer_size == 0) {
+ /* don't bother even trying mmap */
mstream->mmap_base = NULL;
stream->buffer = NULL;
- stream->buffer_size = 0;
- stream->skip = stream->pos = 0;
- i_error("mmap_istream.mmap() failed: %m");
- return -1;
+ } else {
+ mstream->mmap_base =
+ mmap(NULL, stream->buffer_size, PROT_READ, MAP_PRIVATE,
+ mstream->fd, mstream->mmap_offset);
+ if (mstream->mmap_base == MAP_FAILED) {
+ stream->istream.stream_errno = errno;
+ mstream->mmap_base = NULL;
+ stream->buffer = NULL;
+ stream->buffer_size = 0;
+ stream->skip = stream->pos = 0;
+ i_error("mmap_istream.mmap() failed: %m");
+ return -1;
+ }
+ stream->buffer = mstream->mmap_base;
}
- stream->buffer = mstream->mmap_base;
if (stream->buffer_size > mmap_pagesize) {
if (madvise(mstream->mmap_base, stream->buffer_size,
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