posix: Implement set and get scope APIs for pthread attr

Implement `pthread_attr_setscope()` and `pthread_attr_getscope()` is required as part of _POSIX_THREAD_PRIORITY_SCHEDULING Option Group. signed-off-by: Gaetan Perrot <gaetanperrotpro@gmail.com>
zephyrproject-rtos · Feb 2, 2024 · 6b4042b · 6b4042b
1 parent 24ebebd
commit 6b4042b
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diff --git a/include/zephyr/posix/pthread.h b/include/zephyr/posix/pthread.h
@@ -39,6 +39,10 @@ extern "C" {
 #define PTHREAD_CANCEL_DEFERRED     0
 #define PTHREAD_CANCEL_ASYNCHRONOUS 1
 
+/* Pthread scope */
+#define PTHREAD_SCOPE_PROCESS    0
+#define PTHREAD_SCOPE_SYSTEM     1
+
 /* Passed to pthread_once */
 #define PTHREAD_ONCE_INIT {0}
 
@@ -429,6 +433,8 @@ int pthread_attr_getstack(const pthread_attr_t *attr,
 			  void **stackaddr, size_t *stacksize);
 int pthread_attr_setstack(pthread_attr_t *attr, void *stackaddr,
 			  size_t stacksize);
+int pthread_attr_getscope(const pthread_attr_t *attr, int *contentionscope);
+int pthread_attr_setscope(pthread_attr_t *attr, int contentionscope);
 #ifdef CONFIG_PTHREAD_IPC
 int pthread_once(pthread_once_t *once, void (*initFunc)(void));
 #endif

diff --git a/lib/posix/options/posix_internal.h b/lib/posix/options/posix_internal.h
@@ -29,6 +29,7 @@ struct posix_thread_attr {
 	uint16_t guardsize : CONFIG_POSIX_PTHREAD_ATTR_GUARDSIZE_BITS;
 	int8_t priority;
 	uint8_t schedpolicy: 2;
+	uint8_t contentionscope: 2;
 	union {
 		bool caller_destroys: 1;
 		bool initialized: 1;

diff --git a/lib/posix/options/pthread.c b/lib/posix/options/pthread.c
@@ -384,6 +384,40 @@ int pthread_attr_setstack(pthread_attr_t *_attr, void *stackaddr, size_t stacksi
 	return 0;
 }
 
+/**
+ * @brief Set scope attributes in thread attributes object.
+ *
+ * See IEEE 1003.1
+ */
+int pthread_attr_getscope(const pthread_attr_t *_attr, int *contentionscope)
+{
+	struct posix_thread_attr *attr = (struct posix_thread_attr *)_attr;
+
+	if (!__attr_is_initialized(attr) || contentionscope == NULL) {
+		return EINVAL;
+	}
+	*contentionscope = attr->contentionscope;
+	return 0;
+}
+
+/**
+ * @brief Set scope attributes in thread attributes object.
+ *
+ * See IEEE 1003.1
+ */
+int pthread_attr_setscope(pthread_attr_t *_attr, int contentionscope)
+{
+	struct posix_thread_attr *attr = (struct posix_thread_attr *)_attr;
+
+	if (!__attr_is_initialized(attr) ||
+	    (contentionscope != PTHREAD_SCOPE_SYSTEM && contentionscope != PTHREAD_SCOPE_PROCESS)) {
+		LOG_ERR("Invalid pthread_attr_t or contentionscope");
+		return EINVAL;
+	}
+	attr->contentionscope = contentionscope;
+	return 0;
+}
+
 static void posix_thread_recycle_work_handler(struct k_work *work)
 {
 	ARG_UNUSED(work);