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Perform some code cleanup

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This commit is contained in:
Justine Tunney 2022-06-23 10:21:07 -07:00
parent 0dd9629562
commit a4601a24d3
63 changed files with 350 additions and 1643 deletions
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26
libc/intrin/pthread_mutex_lock.c
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@ -21,6 +21,7 @@
#include "libc/calls/calls.h"
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/intrin/futex.internal.h"
#include "libc/intrin/pthread.h"
#include "libc/intrin/spinlock.h"
#include "libc/linux/futex.h"
@ -28,38 +29,15 @@
#include "libc/sysv/consts/futex.h"
#include "libc/sysv/consts/nr.h"
static inline int FutexWait(void *addr, int expect, struct timespec *timeout) {
int ax;
bool cf;
asm volatile(CFLAG_ASM("mov\t%6,%%r10\n\t"
"clc\n\t"
"syscall")
: CFLAG_CONSTRAINT(cf), "=a"(ax)
: "1"(__NR_futex), "D"(addr), "S"(FUTEX_WAIT), "d"(expect),
"g"(timeout)
: "rcx", "r10", "r11", "memory");
if (cf) ax = -ax;
return ax;
}
static int pthread_mutex_lock_spin(pthread_mutex_t *mutex, int tries) {
volatile int i;
struct timespec ts;
if (tries < 7) {
for (i = 0; i != 1 << tries; i++) {
}
tries++;
} else if (IsLinux() || IsOpenbsd()) {
atomic_fetch_add(&mutex->waits, 1);
if (tries < 28) {
ts.tv_sec = 0;
ts.tv_nsec = 4 << tries;
tries++;
} else {
ts.tv_sec = 1;
ts.tv_nsec = 0;
}
FutexWait(&mutex->lock, 1, &ts);
_futex_wait(&mutex->lock, 1, &(struct timespec){1});
atomic_fetch_sub(&mutex->waits, 1);
} else {
sched_yield();