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authorChris Johns <chrisj@rtems.org>2017-12-23 18:18:56 +1100
committerSebastian Huber <sebastian.huber@embedded-brains.de>2018-01-25 08:45:26 +0100
commit2afb22b7e1ebcbe40373ff7e0efae7d207c655a9 (patch)
tree44759efe9374f13200a97e96d91bd9a2b7e5ce2a /cpukit/include/rtems/score/corebarrierimpl.h
parentMAINTAINERS: Add myself to Write After Approval. (diff)
downloadrtems-2afb22b7e1ebcbe40373ff7e0efae7d207c655a9.tar.bz2
Remove make preinstall
A speciality of the RTEMS build system was the make preinstall step. It copied header files from arbitrary locations into the build tree. The header files were included via the -Bsome/build/tree/path GCC command line option. This has at least seven problems: * The make preinstall step itself needs time and disk space. * Errors in header files show up in the build tree copy. This makes it hard for editors to open the right file to fix the error. * There is no clear relationship between source and build tree header files. This makes an audit of the build process difficult. * The visibility of all header files in the build tree makes it difficult to enforce API barriers. For example it is discouraged to use BSP-specifics in the cpukit. * An introduction of a new build system is difficult. * Include paths specified by the -B option are system headers. This may suppress warnings. * The parallel build had sporadic failures on some hosts. This patch removes the make preinstall step. All installed header files are moved to dedicated include directories in the source tree. Let @RTEMS_CPU@ be the target architecture, e.g. arm, powerpc, sparc, etc. Let @RTEMS_BSP_FAMILIY@ be a BSP family base directory, e.g. erc32, imx, qoriq, etc. The new cpukit include directories are: * cpukit/include * cpukit/score/cpu/@RTEMS_CPU@/include * cpukit/libnetworking The new BSP include directories are: * bsps/include * bsps/@RTEMS_CPU@/include * bsps/@RTEMS_CPU@/@RTEMS_BSP_FAMILIY@/include There are build tree include directories for generated files. The include directory order favours the most general header file, e.g. it is not possible to override general header files via the include path order. The "bootstrap -p" option was removed. The new "bootstrap -H" option should be used to regenerate the "headers.am" files. Update #3254.
Diffstat (limited to 'cpukit/include/rtems/score/corebarrierimpl.h')
-rw-r--r--cpukit/include/rtems/score/corebarrierimpl.h173
1 files changed, 173 insertions, 0 deletions
diff --git a/cpukit/include/rtems/score/corebarrierimpl.h b/cpukit/include/rtems/score/corebarrierimpl.h
new file mode 100644
index 0000000000..d5d63659d0
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+++ b/cpukit/include/rtems/score/corebarrierimpl.h
@@ -0,0 +1,173 @@
+/**
+ * @file
+ *
+ * @brief Inlined Routines Associated with the SuperCore Barrier
+ *
+ * This include file contains all of the inlined routines associated
+ * with the SuperCore barrier.
+ */
+
+/*
+ * COPYRIGHT (c) 1989-2006.
+ * 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_SCORE_COREBARRIERIMPL_H
+#define _RTEMS_SCORE_COREBARRIERIMPL_H
+
+#include <rtems/score/corebarrier.h>
+#include <rtems/score/status.h>
+#include <rtems/score/threadqimpl.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @addtogroup ScoreBarrier
+ */
+/**@{**/
+
+#define CORE_BARRIER_TQ_OPERATIONS &_Thread_queue_Operations_FIFO
+
+/**
+ * @brief Initialize core barrier.
+ *
+ * This routine initializes the barrier based on the parameters passed.
+ *
+ * @param[in] the_barrier is the barrier to initialize
+ * @param[in] the_barrier_attributes define the behavior of this instance
+ */
+void _CORE_barrier_Initialize(
+ CORE_barrier_Control *the_barrier,
+ CORE_barrier_Attributes *the_barrier_attributes
+);
+
+RTEMS_INLINE_ROUTINE void _CORE_barrier_Destroy(
+ CORE_barrier_Control *the_barrier
+)
+{
+ _Thread_queue_Destroy( &the_barrier->Wait_queue );
+}
+
+RTEMS_INLINE_ROUTINE void _CORE_barrier_Acquire_critical(
+ CORE_barrier_Control *the_barrier,
+ Thread_queue_Context *queue_context
+)
+{
+ _Thread_queue_Acquire_critical( &the_barrier->Wait_queue, queue_context );
+}
+
+RTEMS_INLINE_ROUTINE void _CORE_barrier_Release(
+ CORE_barrier_Control *the_barrier,
+ Thread_queue_Context *queue_context
+)
+{
+ _Thread_queue_Release( &the_barrier->Wait_queue, queue_context );
+}
+
+/**
+ * @brief Wait for the barrier.
+ *
+ * This routine wait for the barrier to be released. If the barrier
+ * is set to automatic and this is the appropriate thread, then it returns
+ * immediately. Otherwise, the calling thread is blocked until the barrier
+ * is released.
+ *
+ * @param[in] the_barrier is the barrier to wait for
+ * @param[in,out] executing The currently executing thread.
+ * @param[in] wait is true if the calling thread is willing to wait
+ *
+ * @return The method status.
+ */
+Status_Control _CORE_barrier_Seize(
+ CORE_barrier_Control *the_barrier,
+ Thread_Control *executing,
+ bool wait,
+ Thread_queue_Context *queue_context
+);
+
+uint32_t _CORE_barrier_Do_flush(
+ CORE_barrier_Control *the_barrier,
+ Thread_queue_Flush_filter filter,
+ Thread_queue_Context *queue_context
+);
+
+/**
+ * @brief Manually release the barrier.
+ *
+ * This routine manually releases the barrier. All of the threads waiting
+ * for the barrier will be readied.
+ *
+ * @param[in] the_barrier is the barrier to surrender
+ * @param[in] mp_callout is the routine to invoke if the
+ * thread unblocked is remote
+ *
+ * @retval the number of unblocked threads
+ */
+RTEMS_INLINE_ROUTINE uint32_t _CORE_barrier_Surrender(
+ CORE_barrier_Control *the_barrier,
+ Thread_queue_Context *queue_context
+)
+{
+ return _CORE_barrier_Do_flush(
+ the_barrier,
+ _Thread_queue_Flush_default_filter,
+ queue_context
+ );
+}
+
+RTEMS_INLINE_ROUTINE void _CORE_barrier_Flush(
+ CORE_barrier_Control *the_barrier,
+ Thread_queue_Context *queue_context
+)
+{
+ _CORE_barrier_Do_flush(
+ the_barrier,
+ _Thread_queue_Flush_status_object_was_deleted,
+ queue_context
+ );
+}
+
+/**
+ * This function returns true if the automatic release attribute is
+ * enabled in the @a attribute_set and false otherwise.
+ *
+ * @param[in] the_attribute is the attribute set to test
+ *
+ * @return true if the priority attribute is enabled
+ */
+RTEMS_INLINE_ROUTINE bool _CORE_barrier_Is_automatic(
+ CORE_barrier_Attributes *the_attribute
+)
+{
+ return
+ (the_attribute->discipline == CORE_BARRIER_AUTOMATIC_RELEASE);
+}
+
+/**
+ * This routine returns the number of threads currently waiting at the barrier.
+ *
+ * @param[in] the_barrier is the barrier to obtain the number of blocked
+ * threads for
+ * @return the current count of this barrier
+ */
+RTEMS_INLINE_ROUTINE uint32_t _CORE_barrier_Get_number_of_waiting_threads(
+ CORE_barrier_Control *the_barrier
+)
+{
+ return the_barrier->number_of_waiting_threads;
+}
+
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+/* end of include file */