./ChangeLog

Sun Apr  4 11:05:57 1999  Ross Johnson  <rpj@ixobrychus.canberra.edu.au>
        * sched.c (sched.h): Include.
        * sched.h: New file for POSIX 1b scheduling.
        * pthread.h: Move opaque structures to implement.h; move sched_*
        prototypes out and into sched.h.
        * implement.h: Add opaque structures from pthread.h.
        * sched.c (sched_yield): New function.
        * condvar.c (_pthread_sem_*): Rename to sem_*; except for
        _pthread_sem_timedwait which is an private function.
Sat Apr  3 23:28:00 1999  Ross Johnson  <rpj@ixobrychus.canberra.edu.au>
        * Makefile.in (OBJS): Add errno.o.
Fri Apr  2 11:08:50 1999  Ross Johnson  <rpj@ixobrychus.canberra.edu.au>
        * implement.h (_pthread_sem_*): Remove prototypes now defined in
        semaphore.h.
        * pthread.h (sempahore.h): Include.
        * semaphore.h: New file for POSIX 1b semaphores.
        * pthread.h (_pthread_sem_t): Change to sem_t.
        * semaphore.c (_pthread_sem_*): Change to sem_*; these functions
        will be exported from the library; set errno on error.
        - John Bossom <jebossom@cognos.com>
        (_pthread_sem_timedwait): Moved to private.c.
        * private.c (_pthread_sem_timedwait): Moved from semaphore.c;
        set errno on error.
        * errno.c (_errno): New file. New function.
        - John Bossom
        * pthread.h (pthread_t_): Add per-thread errno element.
tests/ChangeLog
Sun Apr  4 12:04:28 1999  Ross Johnson  <rpj@ixobrychus.canberra.edu.au>
        * tsd1.c (mythread): Change Sleep(0) to sched_yield().
        (sched.h): Include.
        * condvar3.c (mythread): Remove redundant Sleep().
        * runtest.bat: Re-organised to make more informative.

1 files changed, 32 insertions, 2 deletions

diff --git a/sched.c b/sched.c
index c07698b..6d53d9b 100644
--- a/sched.c
+++ b/sched.c
@@ -25,8 +25,7 @@
 
 #define ENOSUP 0
 
-#include <errno.h>
-
+#include "sched.h"
 #include "pthread.h"
 #include "implement.h"
 
@@ -150,3 +149,34 @@ int sched_get_priority_min(int policy)
   /* This is independent of scheduling policy in Win32. */
   return THREAD_PRIORITY_LOWEST;
 }
+
+int sched_yield(void)
+     /*
+      * ------------------------------------------------------
+      * DOCPUBLIC
+      *      This function indicates that the calling thread is
+      *      willing to give up some time slices to other threads.
+      *
+      * PARAMETERS
+      *      N/A
+      *
+      *
+      * DESCRIPTION
+      *      This function indicates that the calling thread is
+      *      willing to give up some time slices to other threads.
+      *      NOTE: Since this is part of POSIX 1003.1b
+      *                (realtime extensions), it is defined as returning
+      *                -1 if an error occurs and sets errno to the actual
+      *                error.
+      *
+      * RESULTS
+      *              0               successfully created semaphore,
+      *              ENOSYS          sched_yield not supported,
+      *
+      * ------------------------------------------------------
+      */
+{
+  Sleep(0);
+
+  return 0;
+}