strstr: Update cross-compilation guess.

[pspp] / lib / pthread_sigmask.c

diff --git a/lib/pthread_sigmask.c b/lib/pthread_sigmask.c
index b53b15dd719f3b1089212de3ce9f0b405b090d60..11d549cad41bf9e6f9142af5971484066206db14 100644 (file)
--- a/lib/pthread_sigmask.c
+++ b/lib/pthread_sigmask.c
@@ -22,6 +22,10 @@
 #include <errno.h>
 #include <stddef.h>
 
+#if PTHREAD_SIGMASK_UNBLOCK_BUG
+# include <unistd.h>
+#endif
+
 int
 pthread_sigmask (int how, const sigset_t *new_mask, sigset_t *old_mask)
 #undef pthread_sigmask
@@ -42,6 +46,20 @@ pthread_sigmask (int how, const sigset_t *new_mask, sigset_t *old_mask)
           return (sigprocmask (how, new_mask, old_mask) < 0 ? errno : 0);
         }
     }
+# endif
+# if PTHREAD_SIGMASK_FAILS_WITH_ERRNO
+  if (ret == -1)
+    return errno;
+# endif
+# if PTHREAD_SIGMASK_UNBLOCK_BUG
+  if (ret == 0
+      && new_mask != NULL
+      && (how == SIG_UNBLOCK || how == SIG_SETMASK))
+    {
+      /* Give the OS the opportunity to raise signals that were pending before
+         the pthread_sigmask call and have now been unblocked.  */
+      usleep (1);
+    }
 # endif
   return ret;
 #else