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Allow user to override pthread mutex and cond

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Justine Tunney 2024-12-23 21:57:52 -08:00
parent 4705705548
commit 55b7aa1632
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GPG key ID: BE714B4575D6E328
54 changed files with 216 additions and 102 deletions
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8
libc/dlopen/dlopen.c
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@ -57,6 +57,7 @@
#include "libc/sysv/consts/prot.h"
#include "libc/sysv/errfuns.h"
#include "libc/temp.h"
#include "libc/thread/posixthread.internal.h"
#include "libc/thread/thread.h"
#include "libc/thread/tls.h"
@ -131,6 +132,8 @@ struct {
long __sysv2nt14();
long foreign_tramp();
void __dlopen_lock(void);
void __dlopen_unlock(void);
static _Thread_local char dlerror_buf[128];
@ -435,14 +438,13 @@ static dontinline char *foreign_alloc_block(void) {
static dontinline void *foreign_alloc(size_t n) {
void *res;
static char *block;
static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_lock(&lock);
__dlopen_lock();
if (!block || READ32LE(block) + n > 65536)
if (!(block = foreign_alloc_block()))
return 0;
res = block + READ32LE(block);
WRITE32LE(block, READ32LE(block) + n);
pthread_mutex_unlock(&lock);
__dlopen_unlock();
return res;
}