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util: Add os_create_anonymous_file support on win32

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Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
Reviewed-by: Jesse Natalie <jenatali@microsoft.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18017>
This commit is contained in:
Yonggang Luo
2022-03-29 00:41:50 +08:00
committed by Marge Bot
parent 24b9ad7cd5
commit 5ee3212078
2 changed files with 20 additions and 5 deletions
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20
src/util/anon_file.c
View File

@@ -27,9 +27,10 @@
* Based on weston shared/os-compatibility.c * Based on weston shared/os-compatibility.c
*/ */
#ifndef _WIN32
#include "anon_file.h" #include "anon_file.h"
#ifndef _WIN32
#include <unistd.h> #include <unistd.h>
#include <fcntl.h> #include <fcntl.h>
#include <errno.h> #include <errno.h>
@@ -112,7 +113,7 @@ create_tmpfile_cloexec(char *tmpname)
* SCM_RIGHTS methods. * SCM_RIGHTS methods.
*/ */
int int
os_create_anonymous_file(off_t size, const char *debug_name) os_create_anonymous_file(int64_t size, const char *debug_name)
{ {
int fd, ret; int fd, ret;
#if defined(HAVE_MEMFD_CREATE) #if defined(HAVE_MEMFD_CREATE)
@@ -155,7 +156,7 @@ os_create_anonymous_file(off_t size, const char *debug_name)
if (fd < 0) if (fd < 0)
return -1; return -1;
ret = ftruncate(fd, size); ret = ftruncate(fd, (off_t)size);
if (ret < 0) { if (ret < 0) {
close(fd); close(fd);
return -1; return -1;
@@ -163,4 +164,17 @@ os_create_anonymous_file(off_t size, const char *debug_name)
return fd; return fd;
} }
#else
#include <windows.h>
#include <io.h>
int
os_create_anonymous_file(int64_t size, const char *debug_name)
{
(void)debug_name;
HANDLE h = CreateFileMappingW(INVALID_HANDLE_VALUE, NULL,
PAGE_READWRITE, (size >> 32), size & 0xFFFFFFFF, NULL);
return _open_osfhandle((intptr_t)h, 0);
}
#endif #endif

5
src/util/anon_file.h
View File

@@ -26,8 +26,9 @@
#ifndef _ANON_FILE_H_ #ifndef _ANON_FILE_H_
#define _ANON_FILE_H_ #define _ANON_FILE_H_
#include <sys/types.h> #include <stdint.h>
int os_create_anonymous_file(off_t size, const char *debug_name); /* On win32, off_t is only 32 bit, so always using 64 bit size */
int os_create_anonymous_file(int64_t size, const char *debug_name);
#endif #endif