Use umtx for futex, and SHM_ANON for memfd.
Also use temp files as memfd fallback for other OSes.
Obtained from: FreeBSD ports
---
src/intel/vulkan/anv_allocator.c | 56 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 56 insertions(+)
diff --git a/src/intel/vulkan/anv_allocator.c b/src/intel/vulkan/anv_allocator.c
index 33bd3c68c5..c31d3d17d2 100644
--- a/src/intel/vulkan/anv_allocator.c
+++ b/src/intel/vulkan/anv_allocator.c
@@ -25,7 +25,13 @@
#include <unistd.h>
#include <limits.h>
#include <assert.h>
+#ifdef __linux__
#include <linux/memfd.h>
+#elif __FreeBSD__
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/umtx.h>
+#endif
#include <sys/mman.h>
#include "anv_private.h"
@@ -50,6 +56,34 @@
#define VG_NOACCESS_WRITE(__ptr, __val) (*(__ptr) = (__val))
#endif
+#ifdef __FreeBSD__
+static inline int
+sys_futex(void *addr, int op, int32_t val)
+{
+ return _umtx_op(addr, op, (uint32_t)val, NULL, NULL) == -1 ? errno : 0;
+}
+
+static inline int
+futex_wake(uint32_t *addr, int count)
+{
+ return sys_futex(addr, UMTX_OP_WAKE, count);
+}
+
+static inline int
+futex_wait(uint32_t *addr, int32_t value, int32_t _)
+{
+ return sys_futex(addr, UMTX_OP_WAIT_UINT, value);
+}
+#endif
+
+#ifndef MAP_POPULATE
+#define MAP_POPULATE 0
+#endif
+
+#ifndef MFD_CLOEXEC
+#define MFD_CLOEXEC O_CLOEXEC
+#endif
+
/* Design goals:
*
* - Lock free (except when resizing underlying bos)
@@ -113,7 +147,29 @@ struct anv_mmap_cleanup {
static inline int
memfd_create(const char *name, unsigned int flags)
{
+#if defined(__linux__)
return syscall(SYS_memfd_create, name, flags);
+#elif defined(__FreeBSD__)
+ return shm_open(SHM_ANON, flags | O_RDWR | O_CREAT, 0600);
+#else /* DragonFly, NetBSD, OpenBSD, Solaris */
+ char template[] = "/tmp/shmfd-XXXXXX";
+#ifdef HAVE_MKOSTEMP
+ int fd = mkostemp(template, flags);
+#else
+ int fd = mkstemp(template);
+ if (flags & O_CLOEXEC) {
+ int flags = fcntl(fd, F_GETFD);
+ if (flags != -1) {
+ flags |= FD_CLOEXEC;
+ (void) fcntl(fd, F_SETFD, &flags);
+ }
+ }
+#endif /* HAVE_MKOSTEMP */
+ if (fd >= 0)
+ unlink(template);
+
+ return fd;
+#endif /* __linux__ */
}
#endif
--
2.15.1
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