WebSVN – HelenOS – Diff – /branches/sparc/kernel/test/synch/rwlock4.c

 /*
  * Copyright (C) 2001-2004 Jakub Jermar
  * All rights reserved.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
+ *
  * - Redistributions of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
  * - Redistributions in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
  * - The name of the author may not be used to endorse or promote products
  *   derived from this software without specific prior written permission.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 #include <test.h>
 #include <arch.h>
 #include <atomic.h>
 #include <print.h>
 #include <proc/thread.h>
 #include <arch/types.h>
 #include <arch/context.h>
 #include <context.h>
 #include <panic.h>
 #include <synch/waitq.h>
 #include <synch/rwlock.h>
 #include <synch/synch.h>
 #include <synch/spinlock.h>
 #define READERS     50
 #define WRITERS     50
 static rwlock_t rwlock;
 SPINLOCK_INITIALIZE(rw_lock);
 static waitq_t can_start;
 static uint32_t seed = 0xdeadbeef;
-static uint32_t random(uint32_t max);
-static void writer(void *arg);
-static void reader(void *arg);
-static void failed(void);
 static uint32_t random(uint32_t max)
+{
     uint32_t rc;
     spinlock_lock(&rw_lock);
     rc = seed % max;
     seed = (((seed<<2) ^ (seed>>2)) * 487) + rc;
     spinlock_unlock(&rw_lock);
     return rc;
+}
 static void writer(void *arg)
+{
     int rc, to;
     thread_detach(THREAD);
     waitq_sleep(&can_start);
     to = random(40000);
     printf("cpu%d, tid %d w+ (%d)\n", CPU->id, THREAD->tid, to);
     rc = rwlock_write_lock_timeout(&rwlock, to);
     if (SYNCH_FAILED(rc)) {
         printf("cpu%d, tid %d w!\n", CPU->id, THREAD->tid);
         return;
-    };
+    }
     printf("cpu%d, tid %d w=\n", CPU->id, THREAD->tid);
     if (rwlock.readers_in) panic("Oops.");
     thread_usleep(random(1000000));
     if (rwlock.readers_in) panic("Oops.");
     rwlock_write_unlock(&rwlock);
     printf("cpu%d, tid %d w-\n", CPU->id, THREAD->tid);
+}
 static void reader(void *arg)
+{
     int rc, to;
     thread_detach(THREAD);
     waitq_sleep(&can_start);
     to = random(2000);
     printf("cpu%d, tid %d r+ (%d)\n", CPU->id, THREAD->tid, to);
     rc = rwlock_read_lock_timeout(&rwlock, to);
     if (SYNCH_FAILED(rc)) {
         printf("cpu%d, tid %d r!\n", CPU->id, THREAD->tid);
         return;
+    }
     printf("cpu%d, tid %d r=\n", CPU->id, THREAD->tid);
     thread_usleep(30000);
     rwlock_read_unlock(&rwlock);
     printf("cpu%d, tid %d r-\n", CPU->id, THREAD->tid);
+}
-static void failed(void)
-{
-    printf("Test failed prematurely.\n");
-    thread_exit();
-}
-void test_rwlock4(void)
+char * test_rwlock4(void)
+{
     context_t ctx;
     uint32_t i, k;
-    printf("Read/write locks test #4\n");
     waitq_initialize(&can_start);
     rwlock_initialize(&rwlock);
-    for (;;) {
-        thread_t *thrd;
+    thread_t *thrd;
-        context_save(&ctx);
+    context_save(&ctx);
-        printf("sp=%#x, readers_in=%d\n", ctx.sp, rwlock.readers_in);
+    printf("sp=%#x, readers_in=%d\n", ctx.sp, rwlock.readers_in);
-        k = random(7) + 1;
+    k = random(7) + 1;
-        printf("Creating %d readers\n", k);
+    printf("Creating %d readers\n", k);
-        for (i=0; i<k; i++) {
+    for (i = 0; i < k; i++) {
-            thrd = thread_create(reader, NULL, TASK, 0, "reader");
+        thrd = thread_create(reader, NULL, TASK, 0, "reader");
-            if (thrd)
+        if (thrd)
-                thread_ready(thrd);
+            thread_ready(thrd);
-            else
+        else
-                failed();
-        }
-        k = random(5) + 1;
-        printf("Creating %d writers\n", k);
+            printf("Could not create reader %d\n", i);
-        for (i=0; i<k; i++) {
-            thrd = thread_create(writer, NULL, TASK, 0, "writer");
-            if (thrd)
-                thread_ready(thrd);
-            else
-                failed();
-        }
+    }
-        thread_usleep(20000);
-        waitq_wakeup(&can_start, WAKEUP_ALL);
-    }
+    k = random(5) + 1;
+    printf("Creating %d writers\n", k);
+    for (i=0; i<k; i++) {
+        thrd = thread_create(writer, NULL, TASK, 0, "writer");
+        if (thrd)
+            thread_ready(thrd);
+        else
+            printf("Could not create writer %d\n", i);
+    }
+    thread_usleep(20000);
+    waitq_wakeup(&can_start, WAKEUP_ALL);
+    return NULL;
+}

Subversion Repositories HelenOS

(root)/branches/sparc/kernel/test/synch/rwlock4.c @ 3862 – Rev 2024 → 2028