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-rw-r--r--cpukit/include/rtems/posix/semaphoreimpl.h143
1 files changed, 143 insertions, 0 deletions
diff --git a/cpukit/include/rtems/posix/semaphoreimpl.h b/cpukit/include/rtems/posix/semaphoreimpl.h
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+++ b/cpukit/include/rtems/posix/semaphoreimpl.h
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+/**
+ * @file
+ *
+ * @brief Private Inlined Routines for POSIX Semaphores
+ *
+ * This include file contains the static inline implementation of the private
+ * inlined routines for POSIX Semaphores.
+ */
+
+/*
+ * COPYRIGHT (c) 1989-2013.
+ * On-Line Applications Research Corporation (OAR).
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.org/license/LICENSE.
+ */
+
+#ifndef _RTEMS_POSIX_SEMAPHOREIMPL_H
+#define _RTEMS_POSIX_SEMAPHOREIMPL_H
+
+#include <rtems/posix/semaphore.h>
+#include <rtems/posix/posixapi.h>
+#include <rtems/score/semaphoreimpl.h>
+#include <rtems/seterr.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief This is a random number used to check if a semaphore object is
+ * properly initialized.
+ */
+#define POSIX_SEMAPHORE_MAGIC 0x5d367fe7UL
+
+/**
+ * This defines the information control block used to manage
+ * this class of objects.
+ */
+extern Objects_Information _POSIX_Semaphore_Information;
+
+RTEMS_INLINE_ROUTINE POSIX_Semaphore_Control *
+ _POSIX_Semaphore_Allocate_unprotected( void )
+{
+ return (POSIX_Semaphore_Control *)
+ _Objects_Allocate_unprotected( &_POSIX_Semaphore_Information );
+}
+
+/**
+ * @brief POSIX Semaphore Free
+ *
+ * This routine frees a semaphore control block to the
+ * inactive chain of free semaphore control blocks.
+ */
+RTEMS_INLINE_ROUTINE void _POSIX_Semaphore_Free (
+ POSIX_Semaphore_Control *the_semaphore
+)
+{
+ _Objects_Free( &_POSIX_Semaphore_Information, &the_semaphore->Object );
+}
+
+RTEMS_INLINE_ROUTINE POSIX_Semaphore_Control *_POSIX_Semaphore_Get(
+ sem_t *sem
+)
+{
+ return RTEMS_CONTAINER_OF( sem, POSIX_Semaphore_Control, Semaphore );
+}
+
+RTEMS_INLINE_ROUTINE bool _POSIX_Semaphore_Is_named( const sem_t *sem )
+{
+ return sem->_Semaphore._Queue._name != NULL;
+}
+
+RTEMS_INLINE_ROUTINE bool _POSIX_Semaphore_Is_busy( const sem_t *sem )
+{
+ return sem->_Semaphore._Queue._heads != NULL;
+}
+
+RTEMS_INLINE_ROUTINE void _POSIX_Semaphore_Initialize(
+ sem_t *sem,
+ const char *name,
+ unsigned int value
+)
+{
+ sem->_flags = (uintptr_t) sem ^ POSIX_SEMAPHORE_MAGIC;
+ _Semaphore_Initialize_named( &sem->_Semaphore, name, value );
+}
+
+RTEMS_INLINE_ROUTINE void _POSIX_Semaphore_Destroy( sem_t *sem )
+{
+ sem->_flags = 0;
+ _Semaphore_Destroy( &sem->_Semaphore );
+}
+
+/**
+ * @brief POSIX Semaphore Delete
+ *
+ * This routine supports the sem_close and sem_unlink routines.
+ */
+void _POSIX_Semaphore_Delete( POSIX_Semaphore_Control *the_semaphore );
+
+/**
+ * @brief POSIX Semaphore Namespace Remove
+ */
+RTEMS_INLINE_ROUTINE void _POSIX_Semaphore_Namespace_remove (
+ POSIX_Semaphore_Control *the_semaphore
+)
+{
+ _Objects_Namespace_remove(
+ &_POSIX_Semaphore_Information, &the_semaphore->Object );
+}
+
+RTEMS_INLINE_ROUTINE POSIX_Semaphore_Control *_POSIX_Semaphore_Get_by_name(
+ const char *name,
+ size_t *name_length_p,
+ Objects_Get_by_name_error *error
+)
+{
+ return (POSIX_Semaphore_Control *) _Objects_Get_by_name(
+ &_POSIX_Semaphore_Information,
+ name,
+ name_length_p,
+ error
+ );
+}
+
+#define POSIX_SEMAPHORE_VALIDATE_OBJECT( sem ) \
+ do { \
+ if ( \
+ ( sem ) == NULL \
+ || ( (uintptr_t) ( sem ) ^ POSIX_SEMAPHORE_MAGIC ) != ( sem )->_flags \
+ ) { \
+ rtems_set_errno_and_return_minus_one( EINVAL ); \
+ } \
+ } while ( 0 )
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+/* end of include file */