support for TLS in dynamic-loaded (dlopen) modules

[musl] / src / thread / synccall.c

diff --git a/src/thread/synccall.c b/src/thread/synccall.c
index 2cd25e4..2b7eac2 100644 (file)
--- a/src/thread/synccall.c
+++ b/src/thread/synccall.c
@@ -9,7 +9,6 @@ static struct chain {
 static void (*callback)(void *), *context;
 static int chainlen;
 static sem_t chainlock, chaindone;
-static pthread_rwlock_t lock = PTHREAD_RWLOCK_INITIALIZER;
 
 static void handler(int sig, siginfo_t *si, void *ctx)
 {
@@ -47,14 +46,6 @@ static void handler(int sig, siginfo_t *si, void *ctx)
        errno = old_errno;
 }
 
-void __synccall_wait()
-{
-       struct chain *ch = cur;
-       sem_post(&ch->sem2);
-       while (sem_wait(&ch->sem));
-       sem_post(&ch->sem);
-}
-
 void __synccall(void (*func)(void *), void *ctx)
 {
        pthread_t self;
@@ -67,9 +58,10 @@ void __synccall(void (*func)(void *), void *ctx)
                return;
        }
 
-       pthread_rwlock_wrlock(&lock);
+       __inhibit_ptc();
 
-       __syscall(SYS_rt_sigprocmask, SIG_BLOCK, (uint64_t[]){-1}, &oldmask, 8);
+       __syscall(SYS_rt_sigprocmask, SIG_BLOCK, SIGALL_SET,
+               &oldmask, __SYSCALL_SSLEN);
 
        sem_init(&chaindone, 0, 0);
        sem_init(&chainlock, 0, 1);
@@ -101,17 +93,8 @@ void __synccall(void (*func)(void *), void *ctx)
        sa.sa_handler = SIG_IGN;
        __libc_sigaction(SIGSYNCCALL, &sa, 0);
 
-       __syscall(SYS_rt_sigprocmask, SIG_SETMASK, &oldmask, 0, 8);
-
-       pthread_rwlock_unlock(&lock);
-}
+       __syscall(SYS_rt_sigprocmask, SIG_SETMASK,
+               &oldmask, 0, __SYSCALL_SSLEN);
 
-void __synccall_lock()
-{
-       pthread_rwlock_rdlock(&lock);
-}
-
-void __synccall_unlock()
-{
-       pthread_rwlock_unlock(&lock);
+       __release_ptc();
 }