Imported Upstream version 2.20.0

[platform/upstream/git.git] / thread-utils.c

diff --git a/thread-utils.c b/thread-utils.c
index 97396a7..5329845 100644 (file)
--- a/thread-utils.c
+++ b/thread-utils.c
@@ -20,6 +20,9 @@
 
 int online_cpus(void)
 {
+#ifdef NO_PTHREADS
+       return 1;
+#else
 #ifdef _SC_NPROCESSORS_ONLN
        long ncpus;
 #endif
@@ -35,7 +38,23 @@ int online_cpus(void)
 
        if (!pstat_getdynamic(&psd, sizeof(psd), (size_t)1, 0))
                return (int)psd.psd_proc_cnt;
-#endif
+#elif defined(HAVE_BSD_SYSCTL) && defined(HW_NCPU)
+       int mib[2];
+       size_t len;
+       int cpucount;
+
+       mib[0] = CTL_HW;
+#  ifdef HW_AVAILCPU
+       mib[1] = HW_AVAILCPU;
+       len = sizeof(cpucount);
+       if (!sysctl(mib, 2, &cpucount, &len, NULL, 0))
+               return cpucount;
+#  endif /* HW_AVAILCPU */
+       mib[1] = HW_NCPU;
+       len = sizeof(cpucount);
+       if (!sysctl(mib, 2, &cpucount, &len, NULL, 0))
+               return cpucount;
+#endif /* defined(HAVE_BSD_SYSCTL) && defined(HW_NCPU) */
 
 #ifdef _SC_NPROCESSORS_ONLN
        if ((ncpus = (long)sysconf(_SC_NPROCESSORS_ONLN)) > 0)
@@ -43,10 +62,12 @@ int online_cpus(void)
 #endif
 
        return 1;
+#endif
 }
 
 int init_recursive_mutex(pthread_mutex_t *m)
 {
+#ifndef NO_PTHREADS
        pthread_mutexattr_t a;
        int ret;
 
@@ -58,4 +79,47 @@ int init_recursive_mutex(pthread_mutex_t *m)
                pthread_mutexattr_destroy(&a);
        }
        return ret;
+#else
+       return 0;
+#endif
+}
+
+#ifdef NO_PTHREADS
+int dummy_pthread_create(pthread_t *pthread, const void *attr,
+                        void *(*fn)(void *), void *data)
+{
+       /*
+        * Do nothing.
+        *
+        * The main purpose of this function is to break compiler's
+        * flow analysis and avoid -Wunused-variable false warnings.
+        */
+       return ENOSYS;
 }
+
+int dummy_pthread_init(void *data)
+{
+       /*
+        * Do nothing.
+        *
+        * The main purpose of this function is to break compiler's
+        * flow analysis or it may realize that functions like
+        * pthread_mutex_init() is no-op, which means the (static)
+        * variable is not used/initialized at all and trigger
+        * -Wunused-variable
+        */
+       return ENOSYS;
+}
+
+int dummy_pthread_join(pthread_t pthread, void **retval)
+{
+       /*
+        * Do nothing.
+        *
+        * The main purpose of this function is to break compiler's
+        * flow analysis and avoid -Wunused-variable false warnings.
+        */
+       return ENOSYS;
+}
+
+#endif