libpthread-301.50.1.tar.gz

[apple/libpthread.git] / kern / kern_support.c

diff --git a/kern/kern_support.c b/kern/kern_support.c
index ce5d07e36a235a7fdd4f846e496d76b1d34f05bf..280a18b7565eb8c47b0b1b5e47d94a568298c820 100644 (file)
--- a/kern/kern_support.c
+++ b/kern/kern_support.c
@@ -229,6 +229,11 @@ uint32_t pthread_debug_tracing = 1;
 SYSCTL_INT(_kern, OID_AUTO, pthread_debug_tracing, CTLFLAG_RW | CTLFLAG_LOCKED,
                   &pthread_debug_tracing, 0, "")
 
+static uint32_t pthread_mutex_default_policy;
+
+SYSCTL_INT(_kern, OID_AUTO, pthread_mutex_default_policy, CTLFLAG_RW | CTLFLAG_LOCKED,
+          &pthread_mutex_default_policy, 0, "");
+
 /*
  *       +-----+-----+-----+-----+-----+-----+-----+
  *       | MT  | BG  | UT  | DE  | IN  | UN  | mgr |
@@ -891,6 +896,8 @@ _bsdthread_register(struct proc *p,
                        data.main_qos = _pthread_priority_make_newest(QOS_CLASS_UNSPECIFIED, 0, 0);
                }
 
+               data.mutex_default_policy = pthread_mutex_default_policy;
+
                kr = copyout(&data, pthread_init_data, pthread_init_sz);
                if (kr != KERN_SUCCESS) {
                        return EINVAL;
@@ -4090,6 +4097,11 @@ _pthread_init(void)
        pthread_zone_threadreq = zinit(sizeof(struct threadreq),
                        1024 * sizeof(struct threadreq), 8192, "pthread.threadreq");
 
+       int policy_bootarg;
+       if (PE_parse_boot_argn("pthread_mutex_default_policy", &policy_bootarg, sizeof(policy_bootarg))) {
+               pthread_mutex_default_policy = policy_bootarg;
+       }
+
        /*
         * register sysctls
         */
@@ -4099,6 +4111,7 @@ _pthread_init(void)
        sysctl_register_oid(&sysctl__kern_wq_max_threads);
        sysctl_register_oid(&sysctl__kern_wq_max_constrained_threads);
        sysctl_register_oid(&sysctl__kern_pthread_debug_tracing);
+       sysctl_register_oid(&sysctl__kern_pthread_mutex_default_policy);
 
 #if DEBUG
        sysctl_register_oid(&sysctl__debug_wq_kevent_test);