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Improve multithreading

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Justine Tunney 2024-07-21 06:41:30 -07:00
parent d3167126aa
commit 30afd6ddbb
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GPG key ID: BE714B4575D6E328
38 changed files with 752 additions and 174 deletions
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13
libc/thread/posixthread.internal.h
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@ -74,7 +74,7 @@ struct PosixThread {
atomic_int pt_canceled; // 0x04: thread has bad beliefs
_Atomic(enum PosixThreadStatus) pt_status;
atomic_int ptid; // transitions 0 → tid
atomic_int pt_refs; // negative means free
atomic_int pt_refs; // prevents decimation
void *(*pt_start)(void *); // creation callback
void *pt_arg; // start's parameter
void *pt_rc; // start's return value
@ -103,14 +103,13 @@ int _pthread_setschedparam_freebsd(int, int, const struct sched_param *);
int _pthread_tid(struct PosixThread *) libcesque;
intptr_t _pthread_syshand(struct PosixThread *) libcesque;
long _pthread_cancel_ack(void) libcesque;
void _pthread_decimate(void) libcesque;
void _pthread_free(struct PosixThread *, bool) libcesque;
void _pthread_decimate(bool) libcesque;
void _pthread_free(struct PosixThread *) libcesque;
void _pthread_lock(void) libcesque;
void _pthread_onfork_child(void) libcesque;
void _pthread_onfork_parent(void) libcesque;
void _pthread_onfork_prepare(void) libcesque;
void _pthread_unlock(void) libcesque;
void _pthread_unref(struct PosixThread *) libcesque;
void _pthread_zombify(struct PosixThread *) libcesque;
forceinline pureconst struct PosixThread *_pthread_self(void) {
@ -118,7 +117,11 @@ forceinline pureconst struct PosixThread *_pthread_self(void) {
}
forceinline void _pthread_ref(struct PosixThread *pt) {
atomic_fetch_add_explicit(&pt->pt_refs, 1, memory_order_relaxed);
atomic_fetch_add_explicit(&pt->pt_refs, 1, memory_order_acq_rel);
}
forceinline void _pthread_unref(struct PosixThread *pt) {
atomic_fetch_sub_explicit(&pt->pt_refs, 1, memory_order_acq_rel);
}
COSMOPOLITAN_C_END_