Revision 532b74b2104bd00cbaa99e726e6a7b8997f48744 authored by Junio C Hamano on 13 March 2009, 04:46:50 UTC, committed by Junio C Hamano on 13 March 2009, 04:46:50 UTC
* js/maint-1.6.1-filter-branch-submodule: filter-branch: do not consider diverging submodules a 'dirty worktree'
mmap.c
#include "../git-compat-util.h"
void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset)
{
size_t n = 0;
if (start != NULL || !(flags & MAP_PRIVATE))
die("Invalid usage of mmap when built with NO_MMAP");
start = xmalloc(length);
if (start == NULL) {
errno = ENOMEM;
return MAP_FAILED;
}
while (n < length) {
ssize_t count = pread(fd, (char *)start + n, length - n, offset + n);
if (count == 0) {
memset((char *)start+n, 0, length-n);
break;
}
if (count < 0) {
if (errno == EAGAIN || errno == EINTR)
continue;
free(start);
errno = EACCES;
return MAP_FAILED;
}
n += count;
}
return start;
}
int git_munmap(void *start, size_t length)
{
free(start);
return 0;
}
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