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Add futexes for OpenBSD

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This commit is contained in:
Justine Tunney 2022-06-21 05:11:51 -07:00
parent 1216b6e7c7
commit b8e9f71d33
4 changed files with 46 additions and 8 deletions
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20
libc/intrin/pthread_mutex_wake.c
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@ -16,11 +16,23 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/bits/atomic.h"
#include "libc/dce.h"
#include "libc/bits/asmflag.h"
#include "libc/intrin/pthread.h"
#include "libc/linux/futex.h"
#include "libc/sysv/consts/futex.h"
#include "libc/sysv/consts/nr.h"
static inline int FutexWake(void *addr, int count) {
int ax;
bool cf;
asm volatile(CFLAG_ASM("clc\n\t"
"syscall")
: CFLAG_CONSTRAINT(cf), "=a"(ax)
: "1"(__NR_futex), "D"(addr), "S"(FUTEX_WAKE), "d"(count)
: "rcx", "r11", "memory");
if (cf) ax = -ax;
return ax;
}
int _pthread_mutex_wake(pthread_mutex_t *mutex) {
return LinuxFutexWake(&mutex->lock, 1);
return FutexWake(&mutex->lock, 1);
}