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Improve pthread_join()

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Since we're now on Windows 8, we can have clone() work as advertised on
Windows, where it sends a futex wake to the child tid. It's also likely
we no longer need to work around thread flakes on OpenBSD, in _wait0().
This commit is contained in:
Justine Tunney 2022-09-16 14:02:06 -07:00
parent 3733b43a8f
commit 994e1f4386
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GPG key ID: BE714B4575D6E328
19 changed files with 154 additions and 74 deletions
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10
libc/intrin/rand64.c
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@ -17,18 +17,18 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/intrin/_getauxval.internal.h"
#include "libc/thread/thread.h"
#include "libc/nexgen32e/rdtsc.h"
#include "libc/thread/tls.h"
#include "libc/runtime/internal.h"
#include "libc/runtime/runtime.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/auxv.h"
#include "libc/thread/thread.h"
#include "libc/thread/tls.h"
static struct {
int thepid;
uint128_t thepool;
pthread_mutex_t lock;
pthread_spinlock_t lock;
} g_rand64;
/**
@ -49,7 +49,7 @@ static struct {
uint64_t rand64(void) {
void *p;
uint128_t s;
if (__threaded) pthread_mutex_lock(&g_rand64.lock);
if (__threaded) pthread_spin_lock(&g_rand64.lock);
if (__pid == g_rand64.thepid) {
s = g_rand64.thepool; // normal path
} else {
@ -70,6 +70,6 @@ uint64_t rand64(void) {
g_rand64.thepid = __pid;
}
g_rand64.thepool = (s *= 15750249268501108917ull); // lemur64
if (__threaded) pthread_mutex_unlock(&g_rand64.lock);
pthread_spin_unlock(&g_rand64.lock);
return s >> 64;
}