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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/schedulersimplesmp.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/schedulersimplesmp.h')
-rw-r--r--cpukit/include/rtems/score/schedulersimplesmp.h155
1 files changed, 155 insertions, 0 deletions
diff --git a/cpukit/include/rtems/score/schedulersimplesmp.h b/cpukit/include/rtems/score/schedulersimplesmp.h
new file mode 100644
index 0000000000..bc75b205d5
--- /dev/null
+++ b/cpukit/include/rtems/score/schedulersimplesmp.h
@@ -0,0 +1,155 @@
+/**
+ * @file
+ *
+ * @brief Simple SMP Scheduler API
+ *
+ * @ingroup ScoreSchedulerSMPSimple
+ */
+
+/*
+ * Copyright (C) 2011 On-Line Applications Research Corporation (OAR).
+ *
+ * Copyright (c) 2013, 2016 embedded brains GmbH.
+ *
+ * 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_SCHEDULERSIMPLE_SMP_H
+#define _RTEMS_SCORE_SCHEDULERSIMPLE_SMP_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <rtems/score/scheduler.h>
+#include <rtems/score/schedulerpriority.h>
+#include <rtems/score/schedulersmp.h>
+
+/**
+ * @defgroup ScoreSchedulerSMPSimple Simple Priority SMP Scheduler
+ *
+ * @ingroup ScoreSchedulerSMP
+ *
+ * The Simple Priority SMP Scheduler allocates a processor for the processor
+ * count highest priority ready threads. The thread priority and position in
+ * the ready chain are the only information to determine the scheduling
+ * decision. Threads with an allocated processor are in the scheduled chain.
+ * After initialization the scheduled chain has exactly processor count nodes.
+ * Each processor has exactly one allocated thread after initialization. All
+ * enqueue and extract operations may exchange threads with the scheduled
+ * chain. One thread will be added and another will be removed. The scheduled
+ * and ready chain is ordered according to the thread priority order. The
+ * chain insert operations are O(count of ready threads), thus this scheduler
+ * is unsuitable for most real-time applications.
+ *
+ * The thread preempt mode will be ignored.
+ *
+ * @{
+ */
+
+typedef struct {
+ Scheduler_SMP_Context Base;
+ Chain_Control Ready;
+} Scheduler_simple_SMP_Context;
+
+#define SCHEDULER_SIMPLE_SMP_MAXIMUM_PRIORITY 255
+
+/**
+ * @brief Entry points for the Simple SMP Scheduler.
+ */
+#define SCHEDULER_SIMPLE_SMP_ENTRY_POINTS \
+ { \
+ _Scheduler_simple_SMP_Initialize, \
+ _Scheduler_default_Schedule, \
+ _Scheduler_simple_SMP_Yield, \
+ _Scheduler_simple_SMP_Block, \
+ _Scheduler_simple_SMP_Unblock, \
+ _Scheduler_simple_SMP_Update_priority, \
+ _Scheduler_default_Map_priority, \
+ _Scheduler_default_Unmap_priority, \
+ _Scheduler_simple_SMP_Ask_for_help, \
+ _Scheduler_simple_SMP_Reconsider_help_request, \
+ _Scheduler_simple_SMP_Withdraw_node, \
+ _Scheduler_simple_SMP_Add_processor, \
+ _Scheduler_simple_SMP_Remove_processor, \
+ _Scheduler_simple_SMP_Node_initialize, \
+ _Scheduler_default_Node_destroy, \
+ _Scheduler_default_Release_job, \
+ _Scheduler_default_Cancel_job, \
+ _Scheduler_default_Tick, \
+ _Scheduler_SMP_Start_idle \
+ SCHEDULER_OPERATION_DEFAULT_GET_SET_AFFINITY \
+ }
+
+void _Scheduler_simple_SMP_Initialize( const Scheduler_Control *scheduler );
+
+void _Scheduler_simple_SMP_Node_initialize(
+ const Scheduler_Control *scheduler,
+ Scheduler_Node *node,
+ Thread_Control *the_thread,
+ Priority_Control priority
+);
+
+void _Scheduler_simple_SMP_Block(
+ const Scheduler_Control *scheduler,
+ Thread_Control *thread,
+ Scheduler_Node *node
+);
+
+void _Scheduler_simple_SMP_Unblock(
+ const Scheduler_Control *scheduler,
+ Thread_Control *thread,
+ Scheduler_Node *node
+);
+
+void _Scheduler_simple_SMP_Update_priority(
+ const Scheduler_Control *scheduler,
+ Thread_Control *the_thread,
+ Scheduler_Node *node
+);
+
+bool _Scheduler_simple_SMP_Ask_for_help(
+ const Scheduler_Control *scheduler,
+ Thread_Control *the_thread,
+ Scheduler_Node *node
+);
+
+void _Scheduler_simple_SMP_Reconsider_help_request(
+ const Scheduler_Control *scheduler,
+ Thread_Control *the_thread,
+ Scheduler_Node *node
+);
+
+void _Scheduler_simple_SMP_Withdraw_node(
+ const Scheduler_Control *scheduler,
+ Thread_Control *the_thread,
+ Scheduler_Node *node,
+ Thread_Scheduler_state next_state
+);
+
+void _Scheduler_simple_SMP_Add_processor(
+ const Scheduler_Control *scheduler,
+ Thread_Control *idle
+);
+
+Thread_Control *_Scheduler_simple_SMP_Remove_processor(
+ const Scheduler_Control *scheduler,
+ struct Per_CPU_Control *cpu
+);
+
+void _Scheduler_simple_SMP_Yield(
+ const Scheduler_Control *scheduler,
+ Thread_Control *thread,
+ Scheduler_Node *node
+);
+
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+/* end of include file */