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From Aaron Bannert <aa...@ebuilt.com>
Subject [PATCH] update testthread.c
Date Mon, 23 Jul 2001 06:21:01 GMT
On Sat, Jul 21, 2001 at 09:09:32AM -0700, Ryan Bloom wrote:
> 
> > > Changed the worker routine's signature to take a single parameter:
> > > apr_thread_param_t, which contains the opaque data and the apr_thread_t.
> >
> > Can we simply hide the details, and use our own _thread_main starting
> > point? Put the thread start function ptr in this structure as well, have
> > our _thread_main unwrap whatever is required (and it can create
> > thread-local data, if we ever implement that), finally calling out to the
> > user's *func?
> >
> > > httpd-2.0 will have to be updated after applying this patch to APR.
> >
> > Not if we hide this detail, I believe.  I don't know what that does about
> > providing access to the apr_thread_t in the child thread.  Perhaps we
> > declare the user's func as accepting arguments (apr_thread_t *me, void
> > *mine).
> 
> That was where Aaron started, and I asked him to change it to this model.
> This model is more extensible moving forward IMHO.

At this point for the sake of extensibility I agree.



I've attached an additional update for testthread.c to bring it up to date
with the new thread API. I've added a new test to check that the return
value from apr_thread_exit() is making it back to apr_thread_join()
properly -- it currently doesn't. Expect this test to fail until
apr_thread_join() is fixed (patch to come shortly).

-aaron



Index: srclib/apr/test/testthread.c
===================================================================
RCS file: /home/cvspublic/apr/test/testthread.c,v
retrieving revision 1.17
diff -u -r1.17 testthread.c
--- srclib/apr/test/testthread.c	2001/03/14 15:56:44	1.17
+++ srclib/apr/test/testthread.c	2001/07/23 06:17:02
@@ -58,6 +58,7 @@
 #include "apr_general.h"
 #include "errno.h"
 #include <stdio.h>
+#include <stdlib.h>
 #ifdef BEOS
 #include <unistd.h>
 #endif
@@ -72,57 +73,66 @@
 }
 #else /* !APR_HAS_THREADS */
 
-void * APR_THREAD_FUNC thread_func1(void *data);
-void * APR_THREAD_FUNC thread_func2(void *data);
-void * APR_THREAD_FUNC thread_func3(void *data);
-void * APR_THREAD_FUNC thread_func4(void *data);
+void * APR_THREAD_FUNC thread_func1(apr_thread_param_t *thrparm);
+void * APR_THREAD_FUNC thread_func2(apr_thread_param_t *thrparm);
+void * APR_THREAD_FUNC thread_func3(apr_thread_param_t *thrparm);
+void * APR_THREAD_FUNC thread_func4(apr_thread_param_t *thrparm);
 
 
 apr_lock_t *thread_lock;
 apr_pool_t *context;
 int x = 0;
+apr_status_t exit_ret_val = 123; /* just some made up number to check on later */
 
-void * APR_THREAD_FUNC thread_func1(void *data)
+void * APR_THREAD_FUNC thread_func1(apr_thread_param_t *thrparm)
 {
     int i;
+    apr_thread_t *thread = thrparm->t;
     for (i = 0; i < 10000; i++) {
         apr_lock_acquire(thread_lock);
         x++;
         apr_lock_release(thread_lock);
     }
+    apr_thread_exit(thread, &exit_ret_val);
     return NULL;
 } 
 
-void * APR_THREAD_FUNC thread_func2(void *data)
+void * APR_THREAD_FUNC thread_func2(apr_thread_param_t *thrparm)
 {
     int i;
+    apr_thread_t *thread = thrparm->t;
     for (i = 0; i < 10000; i++) {
         apr_lock_acquire(thread_lock);
         x++;
         apr_lock_release(thread_lock);
     }
+    apr_thread_exit(thread, &exit_ret_val);
     return NULL;
 } 
 
-void * APR_THREAD_FUNC thread_func3(void *data)
+void * APR_THREAD_FUNC thread_func3(apr_thread_param_t *thrparm)
 {
     int i;
+    apr_thread_t *thread = thrparm->t;
     for (i = 0; i < 10000; i++) {
         apr_lock_acquire(thread_lock);
         x++;
         apr_lock_release(thread_lock);
     }
+    apr_thread_exit(thread, &exit_ret_val);
     return NULL;
 } 
 
-void * APR_THREAD_FUNC thread_func4(void *data)
+void * APR_THREAD_FUNC thread_func4(apr_thread_param_t *thrparm)
 {
     int i;
+    apr_thread_t *thread = thrparm->t;
     for (i = 0; i < 10000; i++) {
         apr_lock_acquire(thread_lock);
         x++;
         apr_lock_release(thread_lock);
     }
+    apr_thread_exit(thread, &exit_ret_val);
     return NULL;
 } 
 
@@ -172,7 +182,15 @@
     apr_thread_join(&s2, t2);
     apr_thread_join(&s3, t3);
     apr_thread_join(&s4, t4);
-    fprintf (stdout, "OK\n");   
+    fprintf (stdout, "OK\n");
+
+    fprintf(stdout, "Checking thread's returned value.......");
+    if (s1 != exit_ret_val || s2 != exit_ret_val ||
+        s3 != exit_ret_val || s4 != exit_ret_val) {
+        fprintf(stderr, "Invalid return value (not expected value)\n");
+        exit(-1);
+    }
+    fprintf(stdout, "OK\n");
 
     fprintf(stdout, "Checking if locks worked......."); 
     if (x != 40000) {



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