From 14cd51f7793a9ce07bc435069f57269450141363 Mon Sep 17 00:00:00 2001
From: Stan Shebs <shebs@apple.com>
Date: Fri, 16 Apr 1999 01:35:26 +0000
Subject: Initial revision

---
 gdb/testsuite/gdb.hp/more-steps.c | 140 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 140 insertions(+)
 create mode 100644 gdb/testsuite/gdb.hp/more-steps.c

(limited to 'gdb/testsuite/gdb.hp/more-steps.c')

diff --git a/gdb/testsuite/gdb.hp/more-steps.c b/gdb/testsuite/gdb.hp/more-steps.c
new file mode 100644
index 00000000000..c5ba1e26865
--- /dev/null
+++ b/gdb/testsuite/gdb.hp/more-steps.c
@@ -0,0 +1,140 @@
+/* BeginSourceFile more_steps.c
+
+  This file creates a lot of threads which then execute
+  in parallel, so that wdb can be tested on handling
+  simultaneous thread events.
+
+  To compile:
+
+      cc -Ae +DA1.0 -g -o more_steps -lpthread more_steps.c
+
+  To run:
+  
+     more_threads
+*/
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <assert.h>
+#include <pthread.h>
+
+#define TRUE 1
+#define FALSE 0
+#define N_THREADS 3
+#define PHASES 3
+
+typedef enum {
+  ZERO,
+  ONE,
+  TWO,
+  THREE
+} phase_t;
+
+/* Uncomment to turn on debugging output */
+/* #define DEBUG  */
+
+/* Locks.
+ */
+int lock_one; /* Main W, others R */
+int lock_two; /* ditto */
+int lock_end[ N_THREADS ]; /* Main R, others R[i] */
+int phase[ N_THREADS ];
+
+/* Routine for each thread to run.
+ */
+void *spin( vp )
+    void * vp;
+{
+    int me = (int) vp;
+    int i;
+
+    lock_end[ me ] = TRUE;
+
+    phase[ me ] = ONE;
+
+    while( lock_one );
+
+    phase[ me ] = TWO;
+
+    while( lock_two );
+
+    phase[ me ] = THREE;
+
+    lock_end[ me ] = FALSE;
+}
+
+void
+do_pass()
+{
+    int i;
+    pthread_t t[ N_THREADS ];
+    int err;
+    int done;
+
+    /* Start N_THREADS threads, then join them so
+     * that they are terminated.
+     */
+    for( i = 0; i < N_THREADS; i++ ) {
+        err = pthread_create( &t[i], NULL, spin, (void *)i );
+        if( err != 0 ) {
+            printf( "== Start/stop, error in thread %d create\n", i );
+        }
+    }
+
+    /* Do phase 1.
+     */
+    lock_one = FALSE;
+
+    /* Do phase 2.
+     */
+    lock_two = FALSE;
+    
+    /* Be done.
+     */
+    done = 0;
+    while( !done ) {
+
+       /* Be optimistic.
+        */
+       done = 1;
+       for( i = 0; i < N_THREADS; i++ ) {
+           if( lock_end[i] ) {
+               /* Thread "i" is not ready yet.
+                */
+               done = 0;
+               break;
+           }
+       }
+    }
+    
+    /* Finish up
+     */
+    for( i = 0; i < N_THREADS; i++ ) {
+        err = pthread_join(t[i], NULL );    /* Line 105 */
+        if( err != 0 ) {                    /* Line 106 */
+            printf( "== Start/stop, error in thread %d join\n", i );
+        }
+    }
+
+    i = 10;  /* Line 109.  Null line for setting bpts on. */
+}
+
+main( argc, argv )
+int    argc;
+char **argv;
+{
+    int i;
+    
+    /* Init
+     */
+    lock_one = TRUE;
+    lock_two = TRUE;
+    for( i = 0; i < N_THREADS; i++ ) {
+        lock_end[i] = TRUE;
+        phase[i]    = ZERO;
+    }
+    
+    do_pass();
+    return(0);
+}
-- 
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