Module: xenomai-3
Branch: master
Commit: 178eb4fc18c16d84b8ad46f4d0d0559eb2893888
URL:
http://git.xenomai.org/?p=xenomai-3.git;a=commit;h=178eb4fc18c16d84b8ad46f4d0d0559eb2893888
Author: Philippe Gerum <r...@xenomai.org>
Date: Tue Sep 22 10:02:05 2015 +0200
lib/cobalt: wrap sched_getscheduler(2)
---
include/cobalt/sched.h | 5 +++
lib/cobalt/cobalt.wrappers | 1 +
lib/cobalt/sched.c | 79 ++++++++++++++++++++++++++++++++++++++++++++
lib/cobalt/wrappers.c | 6 ++++
4 files changed, 91 insertions(+)
diff --git a/include/cobalt/sched.h b/include/cobalt/sched.h
index 12c33e6..7c5b26e 100644
--- a/include/cobalt/sched.h
+++ b/include/cobalt/sched.h
@@ -38,6 +38,8 @@ COBALT_DECL(int, sched_get_priority_max(int policy));
COBALT_DECL(int, sched_setscheduler(pid_t pid, int policy,
const struct sched_param *param));
+COBALT_DECL(int, sched_getscheduler(pid_t pid));
+
int sched_get_priority_min_ex(int policy);
int sched_get_priority_max_ex(int policy);
@@ -45,6 +47,9 @@ int sched_get_priority_max_ex(int policy);
int sched_setscheduler_ex(pid_t pid, int policy,
const struct sched_param_ex *param_ex);
+int sched_getscheduler_ex(pid_t pid, int *policy_r,
+ struct sched_param_ex *param_ex);
+
int sched_setconfig_np(int cpu, int policy,
const union sched_config *config, size_t len);
diff --git a/lib/cobalt/cobalt.wrappers b/lib/cobalt/cobalt.wrappers
index c8e24cb..9480f34 100644
--- a/lib/cobalt/cobalt.wrappers
+++ b/lib/cobalt/cobalt.wrappers
@@ -7,6 +7,7 @@
--wrap sched_get_priority_min
--wrap sched_get_priority_max
--wrap sched_setscheduler
+--wrap sched_getscheduler
--wrap pthread_kill
--wrap pthread_join
--wrap pthread_setname_np
diff --git a/lib/cobalt/sched.c b/lib/cobalt/sched.c
index d1abed8..7886a8e 100644
--- a/lib/cobalt/sched.c
+++ b/lib/cobalt/sched.c
@@ -329,6 +329,85 @@ int sched_setscheduler_ex(pid_t pid,
}
/**
+ * Get the scheduling policy of the specified process.
+ *
+ * This service retrieves the scheduling policy of the Xenomai process
+ * identified by @a pid.
+ *
+ * If @a pid does not identify an existing Xenomai thread/process, this
+ * service falls back to the regular sched_getscheduler() service.
+ *
+ * @param pid target process/thread;
+ *
+ * @return 0 on success;
+ * @return an error number if:
+ * - ESRCH, @a pid is not found;
+ * - EINVAL, @a pid is negative
+ * - EFAULT, @a param_ex is an invalid address;
+ *
+ * @see
+ * <a
href="http://www.opengroup.org/onlinepubs/000095399/functions/sched_getscheduler.html";>
+ * Specification.</a>
+ */
+COBALT_IMPL(int, sched_getscheduler, (pid_t pid))
+{
+ struct sched_param_ex param_ex;
+ int ret, policy;
+
+ if (pid < 0) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ ret = XENOMAI_SYSCALL3(sc_cobalt_sched_getscheduler_ex,
+ pid, &policy, ¶m_ex);
+ if (ret == -ESRCH)
+ return __STD(sched_getscheduler(pid));
+
+ if (ret) {
+ errno = -ret;
+ return -1;
+ }
+
+ return policy;
+}
+
+/**
+ * Get extended scheduling policy of a process
+ *
+ * This service is an extended version of the sched_getscheduler()
+ * service, which supports Xenomai-specific and/or additional
+ * scheduling policies, not available with the host Linux environment.
+ * It retrieves the scheduling policy of the Xenomai process/thread
+ * identified by @a pid, and the associated scheduling parameters
+ * (e.g. the priority).
+ *
+ * @param pid queried process/thread. If zero, the current thread is
+ * assumed.
+ *
+ * @param policy_r a pointer to a variable receiving the current
+ * scheduling policy of @a pid.
+ *
+ * @param param_ex a pointer to a structure receiving the current
+ * scheduling parameters of @a pid.
+ *
+ * @return 0 on success;
+ * @return an error number if:
+ * - ESRCH, @a pid is not a Cobalt thread;
+ * - EINVAL, @a pid is negative or @a param_ex is NULL;
+ * - EFAULT, @a param_ex is an invalid address;
+ */
+int sched_getscheduler_ex(pid_t pid, int *policy_r,
+ struct sched_param_ex *param_ex)
+{
+ if (pid < 0 || param_ex == NULL)
+ return EINVAL;
+
+ return -XENOMAI_SYSCALL3(sc_cobalt_sched_getscheduler_ex,
+ pid, policy_r, param_ex);
+}
+
+/**
* Get extended maximum priority of the specified scheduling policy.
*
* This service returns the maximum priority of the scheduling policy
diff --git a/lib/cobalt/wrappers.c b/lib/cobalt/wrappers.c
index e5c9d2f..09c74e5 100644
--- a/lib/cobalt/wrappers.c
+++ b/lib/cobalt/wrappers.c
@@ -84,6 +84,12 @@ int __real_sched_setscheduler(pid_t pid, int policy,
return sched_setscheduler(pid, policy, param);
}
+__weak
+int __real_sched_getscheduler(pid_t pid)
+{
+ return sched_getscheduler(pid);
+}
+
/* pthread */
__weak
int __real_pthread_create(pthread_t *ptid_r,
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