I'm not 100% sure why but GMail has decided that every single e-mail you
send to the mailing list is spam. You might want to check that out. :)
On Sun, Dec 31, 2017 at 8:55 AM, Greg V <greg@unrelenting.technology> wrote:
> 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
>
> _______________________________________________
> mesa-dev mailing list
> mesa-dev@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/mesa-dev
>
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