Add #pragma alloca.

[gnu-emacs] / src / alloca.c

diff --git a/src/alloca.c b/src/alloca.c
index 16f19a27672dca5f35775d32a8780d6b822c63dd..7020f32c88232398fdcc691bc030958eea68c8d2 100644 (file)
--- a/src/alloca.c
+++ b/src/alloca.c
@@ -22,10 +22,18 @@
    your main control loop, etc. to force garbage collection.  */
 
 #ifdef HAVE_CONFIG_H
-#include "config.h"
+#include <config.h>
 #endif
 
-/* If compiling with GCC, this file's not needed.  */
+#ifdef emacs
+#include "blockinput.h"
+#endif
+
+/* If compiling with GCC 2, this file's not needed.  */
+#if !defined (__GNUC__) || __GNUC__ < 2
+
+/* If someone has defined alloca as a macro,
+   there must be some other way alloca is supposed to work.  */
 #ifndef alloca
 
 #ifdef emacs
@@ -168,6 +176,10 @@ alloca (size)
   {
     register header *hp;       /* Traverses linked list.  */
 
+#ifdef emacs
+    BLOCK_INPUT;
+#endif
+
     for (hp = last_alloca_header; hp != NULL;)
       if ((STACK_DIR > 0 && hp->h.deep > depth)
          || (STACK_DIR < 0 && hp->h.deep < depth))
@@ -182,6 +194,10 @@ alloca (size)
        break;                  /* Rest are not deeper.  */
 
     last_alloca_header = hp;   /* -> last valid storage.  */
+
+#ifdef emacs
+    UNBLOCK_INPUT;
+#endif
   }
 
   if (size == 0)
@@ -473,3 +489,4 @@ i00afunc (long address)
 #endif /* CRAY */
 
 #endif /* no alloca */
+#endif /* not GCC version 2 */