2001-06-25 Ross Johnson <rpj@setup1.ise.canberra.edu.au>

        * create.c (pthread_create): Add priority inheritance
        attributes.
        * mutex.c (pthread_mutex_lock): Remove some overhead for
        PTHREAD_MUTEX_NORMAL mutex types. Specifically, avoid
        calling pthread_self() and pthread_equal() to check/set
        the mutex owner. Introduce a new pseudo owner for this
        type. Test results suggest increases in speed of up to
        90% for non-blocking locks.
        This is the default type of mutex used internally by other
        synchronising objects, ie. condition variables and
        read-write locks. The test rwlock7.c shows about a
        30-35% speed increase over snapshot 2001-06-06. The
        price of this is that the application developer
        must ensure correct behaviour, or explicitly set the
        mutex to a safer type such as PTHREAD_MUTEX_ERRORCHECK.
        For example, PTHREAD_MUTEX_NORMAL (or PTHREAD_MUTEX_DEFAULT)
        type mutexes will not return an error if a thread which is not
        the owner calls pthread_mutex_unlock. The call will succeed
        in unlocking the mutex if it is currently locked, but a
        subsequent unlock by the true owner will then fail with EPERM.
        This is however consistent with some other implementations.
        (pthread_mutex_unlock): Likewise.
        (pthread_mutex_trylock): Likewise.
        (pthread_mutex_destroy): Likewise.
        * attr.c (pthread_attr_init): PTHREAD_EXPLICIT_SCHED is the
        default inheritance attribute; THREAD_PRIORITY_NORMAL is
        the default priority for new threads.
        * sched.c (pthread_attr_setschedpolicy): Added routine.
        (pthread_attr_getschedpolicy): Added routine.
        (pthread_attr_setinheritsched): Added routine.
        (pthread_attr_getinheritsched): Added routine.
        * pthread.h (sched_rr_set_interval): Added as a macro;
        returns -1 with errno set to ENOSYS.

2001-06-23  Ross Johnson  <rpj@setup1.ise.canberra.edu.au>

        *sched.c (pthread_attr_setschedparam): Add priority range
        check.
        (sched_setscheduler): New function; checks for a valid
        pid and policy; checks for permission to set information
        in the target process; expects pid to be a Win32 process ID,
        not a process handle; the only scheduler policy allowed is
        SCHED_OTHER.
        (sched_getscheduler): Likewise, but checks for permission
        to query.
        * pthread.h (SCHED_*): Moved to sched.h as defined in the
        POSIX standard.
        * sched.h (SCHED_*): Moved from pthread.h.
        (pid_t): Defined if necessary.
        (sched_setscheduler): Defined.
        (sched_getscheduler): Defined.
        * pthread.def (sched_setscheduler): Exported.
        (sched_getscheduler): Likewise.

2001-06-23  Ross Johnson  <rpj@setup1.ise.canberra.edu.au>

        Contributed by -  Ralf Brese <Ralf.Brese@pdb4.siemens.de>

        * create.c (pthread_create): Set thread priority from
        thread attributes.

1 files changed, 48 insertions, 0 deletions

diff --git a/sched.h b/sched.h
index eff9d6b..e4e02a2 100644
--- a/sched.h
+++ b/sched.h
@@ -28,6 +28,49 @@
 #ifndef _SCHED_H
 #define _SCHED_H
 
+#if !defined( PTW32_HEADER )
+#define PTW32_HEADER
+
+#ifdef _UWIN
+#   define HAVE_STRUCT_TIMESPEC 1
+#   define HAVE_SIGNAL_H        1
+#   undef HAVE_CONFIG_H
+#   pragma comment(lib, "pthread")
+#endif
+
+#endif /* PTW32_HEADER */
+
+#if defined(__MINGW32__) || defined(_UWIN)
+/* For pid_t */
+#  include <sys/types.h>
+/* Required by Unix 98 - including sched.h makes time.h available */
+#  include <time.h>
+#else
+typedef DWORD pid_t;
+#endif
+
+#if ! defined(HAVE_STRUCT_TIMESPEC) && ! defined(PTW32_TIMESPEC)
+#define PTW32_TIMESPEC
+struct timespec {
+	long tv_sec;
+	long tv_nsec;
+};
+#endif /* HAVE_STRUCT_TIMESPEC */
+
+
+/* Thread scheduling policies */
+enum {
+  SCHED_OTHER = 0,
+  SCHED_FIFO,
+  SCHED_RR,
+  SCHED_MIN   = SCHED_OTHER,
+  SCHED_MAX   = SCHED_RR
+};
+
+struct sched_param {
+  int sched_priority;
+};
+
 #ifdef __cplusplus
 extern "C"
 {
@@ -39,6 +82,11 @@ int sched_get_priority_min (int policy);
 
 int sched_get_priority_max (int policy);
 
+int sched_setscheduler (pid_t pid, int policy);
+
+int sched_getscheduler (pid_t pid);
+
+int sched_rr_get_interval(pid_t pid, struct timespec * interval);
 
 #ifdef __cplusplus
 }                               /* End of extern "C" */