Basically ripped off of [1] by Chris Wilson, which I thought should live in libdrm too (even though it's needed in Mesa anyway). [1] https://lists.freedesktop.org/archives/mesa-dev/2017-June/159894.html Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> Signed-off-by: Eric Engestrom <eric@xxxxxxxxxxxx> --- xf86drm.h | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/xf86drm.h b/xf86drm.h index aeed543f..eb75b944 100644 --- a/xf86drm.h +++ b/xf86drm.h @@ -38,6 +38,9 @@ #include <sys/types.h> #include <stdint.h> #include <drm.h> +#if defined(__linux__) && defined(__GNUC__) && defined (__x86_64__) +#include <sys/syscall.h> +#endif #include <sys/ioctl.h> #include <errno.h> @@ -135,6 +138,30 @@ drmIoctl(int fd, unsigned long request, void *arg) return ret; } +/** + * Call ioctl, restarting if it is interupted, and return the error. + */ +static inline int +drmIoctl2(int fd, unsigned long request, void *arg) +{ + int result; + + do { +#if defined(__linux__) && defined(__GNUC__) && defined (__x86_64__) + __asm__("syscall" + : "=a" (result) + : "0" (__NR_ioctl), "D" (fd), "S" (request), "d" (arg) + : "cc", "rcx", "r11", "memory"); +#else + result = ioctl(fd, request, arg); + if (result == -1) + result = -errno; +#endif + } while (result == -EINTR || result == -EAGAIN); + + return result; +} + extern void *drmGetHashTable(void); extern drmHashEntry *drmGetEntry(int fd); -- Cheers, Eric _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
