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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/posix/condimpl.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/posix/condimpl.h')
-rw-r--r--cpukit/include/rtems/posix/condimpl.h184
1 files changed, 184 insertions, 0 deletions
diff --git a/cpukit/include/rtems/posix/condimpl.h b/cpukit/include/rtems/posix/condimpl.h
new file mode 100644
index 0000000000..66e09bf6d8
--- /dev/null
+++ b/cpukit/include/rtems/posix/condimpl.h
@@ -0,0 +1,184 @@
+/**
+ * @file
+ *
+ * This include file contains the static inline implementation of the private
+ * inlined routines for POSIX condition variables.
+ */
+
+/*
+ * 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_CONDIMPL_H
+#define _RTEMS_POSIX_CONDIMPL_H
+
+#include <errno.h>
+#include <pthread.h>
+
+#include <rtems/score/percpu.h>
+#include <rtems/score/threadqimpl.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct {
+ unsigned long flags;
+ Thread_queue_Syslock_queue Queue;
+ pthread_mutex_t *mutex;
+} POSIX_Condition_variables_Control;
+
+#define POSIX_CONDITION_VARIABLES_CLOCK_MONOTONIC 0x1UL
+
+#define POSIX_CONDITION_VARIABLES_FLAGS_MASK 0x1UL
+
+#define POSIX_CONDITION_VARIABLES_MAGIC 0x18dfb1feUL
+
+/**
+ * Constant to indicate condition variable does not currently have
+ * a mutex assigned to it.
+ */
+#define POSIX_CONDITION_VARIABLES_NO_MUTEX NULL
+
+#define POSIX_CONDITION_VARIABLES_TQ_OPERATIONS &_Thread_queue_Operations_FIFO
+
+#define POSIX_CONDITION_VARIABLE_OF_THREAD_QUEUE_QUEUE( queue ) \
+ RTEMS_CONTAINER_OF( \
+ queue, POSIX_Condition_variables_Control, Queue.Queue )
+
+/**
+ * The default condition variable attributes structure.
+ */
+extern const pthread_condattr_t _POSIX_Condition_variables_Default_attributes;
+
+static inline POSIX_Condition_variables_Control *_POSIX_Condition_variables_Get(
+ pthread_cond_t *cond
+)
+{
+ return (POSIX_Condition_variables_Control *) cond;
+}
+
+RTEMS_INLINE_ROUTINE void _POSIX_Condition_variables_Initialize(
+ POSIX_Condition_variables_Control *the_cond,
+ const pthread_condattr_t *the_attr
+)
+{
+ unsigned long flags;
+
+ _Thread_queue_Queue_initialize( &the_cond->Queue.Queue, NULL );
+ the_cond->mutex = POSIX_CONDITION_VARIABLES_NO_MUTEX;
+
+ flags = (uintptr_t) the_cond ^ POSIX_CONDITION_VARIABLES_MAGIC;
+ flags &= ~POSIX_CONDITION_VARIABLES_FLAGS_MASK;
+
+ if ( the_attr->clock == CLOCK_MONOTONIC ) {
+ flags |= POSIX_CONDITION_VARIABLES_CLOCK_MONOTONIC;
+ }
+
+ the_cond->flags = flags;
+}
+
+RTEMS_INLINE_ROUTINE void _POSIX_Condition_variables_Destroy(
+ POSIX_Condition_variables_Control *the_cond
+)
+{
+ the_cond->flags = ~the_cond->flags;
+}
+
+RTEMS_INLINE_ROUTINE clockid_t _POSIX_Condition_variables_Get_clock(
+ unsigned long flags
+)
+{
+ if ( ( flags & POSIX_CONDITION_VARIABLES_CLOCK_MONOTONIC ) != 0 ) {
+ return CLOCK_MONOTONIC;
+ }
+
+ return CLOCK_REALTIME;
+}
+
+RTEMS_INLINE_ROUTINE Thread_Control *_POSIX_Condition_variables_Acquire(
+ POSIX_Condition_variables_Control *the_cond,
+ Thread_queue_Context *queue_context
+)
+{
+ ISR_Level level;
+ Thread_Control *executing;
+
+ _Thread_queue_Context_ISR_disable( queue_context, level );
+ _Thread_queue_Context_set_ISR_level( queue_context, level );
+ executing = _Thread_Executing;
+ _Thread_queue_Queue_acquire_critical(
+ &the_cond->Queue.Queue,
+ &executing->Potpourri_stats,
+ &queue_context->Lock_context.Lock_context
+ );
+
+ return executing;
+}
+
+RTEMS_INLINE_ROUTINE void _POSIX_Condition_variables_Release(
+ POSIX_Condition_variables_Control *the_cond,
+ Thread_queue_Context *queue_context
+)
+{
+ _Thread_queue_Queue_release(
+ &the_cond->Queue.Queue,
+ &queue_context->Lock_context.Lock_context
+ );
+}
+
+/**
+ * @brief Implements wake up version of the "signal" operation.
+ *
+ * A support routine which implements guts of the broadcast and single task
+ * wake up version of the "signal" operation.
+ */
+int _POSIX_Condition_variables_Signal_support(
+ pthread_cond_t *cond,
+ bool is_broadcast
+);
+
+/**
+ * @brief POSIX condition variables wait support.
+ *
+ * A support routine which implements guts of the blocking, non-blocking, and
+ * timed wait version of condition variable wait routines.
+ */
+int _POSIX_Condition_variables_Wait_support(
+ pthread_cond_t *cond,
+ pthread_mutex_t *mutex,
+ const struct timespec *abstime
+);
+
+bool _POSIX_Condition_variables_Auto_initialization(
+ POSIX_Condition_variables_Control *the_cond
+);
+
+#define POSIX_CONDITION_VARIABLES_VALIDATE_OBJECT( the_cond, flags ) \
+ do { \
+ if ( ( the_cond ) == NULL ) { \
+ return EINVAL; \
+ } \
+ flags = ( the_cond )->flags; \
+ if ( \
+ ( ( (uintptr_t) ( the_cond ) ^ POSIX_CONDITION_VARIABLES_MAGIC ) \
+ & ~POSIX_CONDITION_VARIABLES_FLAGS_MASK ) \
+ != ( flags & ~POSIX_CONDITION_VARIABLES_FLAGS_MASK ) \
+ ) { \
+ if ( !_POSIX_Condition_variables_Auto_initialization( the_cond ) ) { \
+ return EINVAL; \
+ } \
+ } \
+ } while ( 0 )
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+/* end of include file */