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Improve threading support further

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This commit is contained in:
Justine Tunney 2022-05-17 04:14:28 -07:00
parent 8bfb70ca3f
commit ce71677156
61 changed files with 882 additions and 747 deletions
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6
libc/intrin/cxaatexit.c
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@ -19,6 +19,7 @@
#include "libc/assert.h"
#include "libc/bits/weaken.h"
#include "libc/calls/strace.internal.h"
#include "libc/intrin/spinlock.h"
#include "libc/macros.internal.h"
#include "libc/mem/mem.h"
#include "libc/nexgen32e/bsr.h"
@ -28,6 +29,8 @@
STATIC_YOINK("__cxa_finalize");
static int __cxa_lock;
/**
* Adds global destructor.
*
@ -47,6 +50,7 @@ noasan int __cxa_atexit(void *fp, void *arg, void *pred) {
unsigned i;
struct CxaAtexitBlock *b, *b2;
_Static_assert(ATEXIT_MAX == CHAR_BIT * sizeof(b->mask), "");
_spinlock(&__cxa_lock);
b = __cxa_blocks.p;
if (!b) b = __cxa_blocks.p = &__cxa_blocks.root;
if (!~b->mask) {
@ -55,6 +59,7 @@ noasan int __cxa_atexit(void *fp, void *arg, void *pred) {
b2->next = b;
__cxa_blocks.p = b = b2;
} else {
_spunlock(&__cxa_lock);
return enomem();
}
}
@ -64,5 +69,6 @@ noasan int __cxa_atexit(void *fp, void *arg, void *pred) {
b->p[i].fp = fp;
b->p[i].arg = arg;
b->p[i].pred = pred;
_spunlock(&__cxa_lock);
return 0;
}