Revert "Refs #294. Used pthread_atfork to avoid hang after a Unix fork."

This reverts commit 3617c22a56.

driver/others/blas_server.c

@@ -83,8 +83,6 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #define ATTRIBUTE_SIZE 128
 
-extern void openblas_warning(int verbose, const char * msg);
-
 /* This is a thread server model implementation.  The threads are   */
 /* spawned at first access to blas library, and still remains until */
 /* destruction routine is called.  The number of threads are        */
@@ -923,17 +921,5 @@ int BLASFUNC(blas_thread_shutdown)(void){
   return 0;
 }
 
-/*
-https://github.com/xianyi/OpenBLAS/issues/294
-Use pthread_atfork to close blas_thread_server before fork.
-Then, re-init blas_thread_server after fork at child and parent.
-*/
-void openblas_fork_handler()
-{
-  int err;
-  err = pthread_atfork (BLASFUNC(blas_thread_shutdown), blas_thread_init, blas_thread_init);
-  if(err != 0)
-    openblas_warning(0, "OpenBLAS cannot install fork handler. You may meet hang after fork.\n");
-}
 #endif
 

driver/others/blas_server_omp.c

@@ -315,9 +315,4 @@ int exec_blas(BLASLONG num, blas_queue_t *queue){
   return 0;
 }
 
-void openblas_fork_handler()
-{
-
-}
-
 #endif

driver/others/blas_server_win32.c

@@ -498,8 +498,3 @@ void openblas_set_num_threads(int num)
 {
 	goto_set_num_threads(num);
 }
-
-void openblas_fork_handler()
-{
-
-}

driver/others/memory.c

@@ -1288,11 +1288,7 @@ void CONSTRUCTOR gotoblas_init(void) {
 #ifdef SMP
   if (blas_cpu_number == 0) blas_get_cpu_number();
 #ifdef SMP_SERVER
-  if (blas_server_avail == 0) {
-    blas_thread_init();
-    //deal with pthread and fork.
-    openblas_fork_handler();
-  }
+  if (blas_server_avail == 0) blas_thread_init();
 #endif
 #endif