mirror of
https://github.com/xomboverlord/ldc.git
synced 2026-01-16 04:43:14 +01:00
97 lines
1.6 KiB
C
97 lines
1.6 KiB
C
// Copyright (c) 2000-2011 by Digital Mars
|
|
// All Rights Reserved
|
|
// written by Walter Bright
|
|
// http://www.digitalmars.com
|
|
// License for redistribution is by either the Artistic License
|
|
// in artistic.txt, or the GNU General Public License in gnu.txt.
|
|
// See the included readme.txt for details.
|
|
|
|
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
#include <sys/mman.h>
|
|
|
|
|
|
/*************************************
|
|
* This is all necessary to get fd initialized at startup.
|
|
*/
|
|
|
|
#define FDMAP 0
|
|
|
|
#if FDMAP
|
|
#include <fcntl.h>
|
|
|
|
struct OS_INIT
|
|
{
|
|
static int fd;
|
|
|
|
OS_INIT();
|
|
};
|
|
|
|
OS_INIT os_init;
|
|
|
|
int OS_INIT::fd = 0;
|
|
|
|
OS_INIT::OS_INIT()
|
|
{
|
|
fd = open("/dev/zero", O_RDONLY);
|
|
}
|
|
#endif
|
|
|
|
/***********************************
|
|
* Map memory.
|
|
*/
|
|
|
|
void *os_mem_map(unsigned nbytes)
|
|
{ void *p;
|
|
|
|
errno = 0;
|
|
#if FDMAP
|
|
p = mmap(NULL, nbytes, PROT_READ | PROT_WRITE, MAP_PRIVATE, OS_INIT::fd, 0);
|
|
#else
|
|
p = mmap(NULL, nbytes, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0);
|
|
#endif
|
|
return (p == MAP_FAILED) ? NULL : p;
|
|
}
|
|
|
|
/***********************************
|
|
* Commit memory.
|
|
* Returns:
|
|
* 0 success
|
|
* !=0 failure
|
|
*/
|
|
|
|
int os_mem_commit(void *base, unsigned offset, unsigned nbytes)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
|
|
/***********************************
|
|
* Decommit memory.
|
|
* Returns:
|
|
* 0 success
|
|
* !=0 failure
|
|
*/
|
|
|
|
int os_mem_decommit(void *base, unsigned offset, unsigned nbytes)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/***********************************
|
|
* Unmap memory allocated with os_mem_map().
|
|
* Returns:
|
|
* 0 success
|
|
* !=0 failure
|
|
*/
|
|
|
|
int os_mem_unmap(void *base, unsigned nbytes)
|
|
{
|
|
return munmap(base, nbytes);
|
|
}
|
|
|
|
|
|
|
|
|