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It looks like Irix works alright with the /dev/zero trick for mmap().

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I had to include fcntl.h for Irix to get symbol O_RDWR.
This commit is contained in:
Chris Want 2006-03-05 14:58:56 +00:00
parent 58f4fcfd6e
commit 46daa8d742
1 changed files with 17 additions and 4 deletions
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21
intern/guardedalloc/intern/mallocn.c
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@ -252,16 +252,29 @@ void *MEM_callocN(unsigned int len, const char *str)
/* note; mmap returns zero'd memory */
void *MEM_mapallocN(unsigned int len, const char *str)
{
#if defined(AMIGA) || defined(__BeOS) || defined(WIN32) || defined(__sgi)
#if defined(AMIGA) || defined(__BeOS) || defined(WIN32)
return MEM_callocN(len, str);
#else
MemHead *memh;
len = (len + 3 ) & ~3; /* allocate in units of 4 */
memh= mmap(0, len+sizeof(MemHead)+sizeof(MemTail),
PROT_READ|PROT_WRITE, MAP_SHARED|MAP_ANON, -1, 0);
#ifdef __sgi
{
#include <fcntl.h>
int fd;
fd = open("/dev/zero", O_RDWR);
memh= mmap(0, len+sizeof(MemHead)+sizeof(MemTail),
PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
close(fd);
}
#else
memh= mmap(0, len+sizeof(MemHead)+sizeof(MemTail),
PROT_READ|PROT_WRITE, MAP_SHARED|MAP_ANON, -1, 0);
#endif
if(memh!=(MemHead *)-1) {
make_memhead_header(memh, len, str);
memh->mmap= 1;