From a311086d622d3c778e1da57cfae167c0ab1c0fb4 Mon Sep 17 00:00:00 2001 From: rpj Date: Sun, 1 Jul 2001 13:23:10 +0000 Subject: 2001-06-25 Ross Johnson * 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 *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 Contributed by - Ralf Brese * create.c (pthread_create): Set thread priority from thread attributes. --- implement.h | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) (limited to 'implement.h') diff --git a/implement.h b/implement.h index da094c8..e2acba3 100644 --- a/implement.h +++ b/implement.h @@ -35,8 +35,9 @@ #include #endif -/* changed include from to use local file during development */ +/* use local include files during development */ #include "semaphore.h" +#include "sched.h" typedef enum { /* @@ -107,7 +108,8 @@ struct pthread_attr_t_ { void *stackaddr; size_t stacksize; int detachstate; - int priority; + struct sched_param param; + int inheritsched; #if HAVE_SIGSET_T sigset_t sigmask; #endif /* HAVE_SIGSET_T */ @@ -319,7 +321,12 @@ struct ThreadKeyAssoc { #define PTW32_EPS_EXIT (1) #define PTW32_EPS_CANCEL (2) -#define PTW32_MUTEX_LOCK_IDX_INIT (-1) +/* Mutex constants */ +enum { + PTW32_MUTEX_LOCK_IDX_INIT = -1, + PTW32_MUTEX_OWNER_ANONYMOUS = 1 +}; + /* Declared in global.c */ extern int ptw32_processInitialized; -- cgit v1.2.3