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authorrpj <rpj>2001-07-01 13:23:10 +0000
committerrpj <rpj>2001-07-01 13:23:10 +0000
commita311086d622d3c778e1da57cfae167c0ab1c0fb4 (patch)
tree760a76a351c18331ff92239366804bd4b866dea6 /tests/priority1.c
parent528fccade9ca5f90db376e08b2cb85b3fc822a45 (diff)
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.
Diffstat (limited to 'tests/priority1.c')
-rw-r--r--tests/priority1.c78
1 files changed, 78 insertions, 0 deletions
diff --git a/tests/priority1.c b/tests/priority1.c
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--- /dev/null
+++ b/tests/priority1.c
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+/*
+ * File: priority1.c
+ *
+ * Test Synopsis:
+ * - Test thread priority explicit setting using thread attribute.
+ *
+ * Test Method (Validation or Falsification):
+ * -
+ *
+ * Requirements Tested:
+ * -
+ *
+ * Features Tested:
+ * -
+ *
+ * Cases Tested:
+ * -
+ *
+ * Description:
+ * -
+ *
+ * Environment:
+ * -
+ *
+ * Input:
+ * - None.
+ *
+ * Output:
+ * - File name, Line number, and failed expression on failure.
+ * - No output on success.
+ *
+ * Assumptions:
+ * -
+ *
+ * Pass Criteria:
+ * - Process returns zero exit status.
+ *
+ * Fail Criteria:
+ * - Process returns non-zero exit status.
+ */
+
+#include "test.h"
+
+void * func(void * arg)
+{
+ int policy;
+ struct sched_param param;
+
+ assert(pthread_getschedparam(pthread_self(), &policy, &param) == 0);
+ assert(policy == SCHED_OTHER);
+ return (void *) param.sched_priority;
+}
+
+int
+main()
+{
+ pthread_t t;
+ pthread_attr_t attr;
+ void * result = NULL;
+ struct sched_param param;
+ int maxPrio = sched_get_priority_max(SCHED_OTHER);
+ int minPrio = sched_get_priority_min(SCHED_OTHER);
+
+ assert(pthread_attr_init(&attr) == 0);
+ assert(pthread_attr_setinheritsched(&attr, PTHREAD_EXPLICIT_SCHED) == 0);
+
+ for (param.sched_priority = minPrio;
+ param.sched_priority <= maxPrio;
+ param.sched_priority++)
+ {
+ assert(pthread_attr_setschedparam(&attr, &param) == 0);
+ assert(pthread_create(&t, &attr, func, NULL) == 0);
+ pthread_join(t, &result);
+ assert((int) result == param.sched_priority);
+ }
+
+ return 0;
+}