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Make locks more reliable

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This change switches most of the core locks to be re-entrant, in order
to reduce the chance of deadlocking code that does, clever things with
asynchronous signal handlers. This change implements it it in pthreads
so we're one step closer to having a standardized threading primitives
This commit is contained in:
Justine Tunney 2022-06-11 01:59:26 -07:00
parent 5ea618f0af
commit c260345e06
35 changed files with 369 additions and 258 deletions
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7
libc/intrin/g_fds.c
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@ -19,6 +19,7 @@
#include "libc/bits/pushpop.h"
#include "libc/calls/internal.h"
#include "libc/calls/strace.internal.h"
#include "libc/intrin/pthread.h"
#include "libc/intrin/spinlock.h"
#include "libc/nt/runtime.h"
#include "libc/sysv/consts/o.h"
@ -26,11 +27,7 @@
STATIC_YOINK("_init_g_fds");
struct Fds g_fds;
_Alignas(64) int __fds_lock_obj;
void __fds_lock(void) {
_spinlock(&__fds_lock_obj);
}
pthread_mutex_t __fds_lock_obj;
textstartup void InitializeFileDescriptors(void) {
struct Fds *fds;