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author | Joel Sherrill <joel.sherrill@OARcorp.com> | 2011-03-16 16:32:22 +0000 |
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committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 2011-03-16 16:32:22 +0000 |
commit | 0118ed65ea96db1032771620fc5fb1c1290f9d47 (patch) | |
tree | 30a21550f5c2fc753634491040113fce235a3b5c /cpukit/score/src/schedulersimplereadyqueueenqueue.c | |
parent | 2011-03-16 Joel Sherrill <joel.sherrill@oarcorp.com> (diff) | |
download | rtems-0118ed65ea96db1032771620fc5fb1c1290f9d47.tar.bz2 |
2011-03-16 Jennifer Averett <jennifer.averett@OARcorp.com>
PR 1743/cpu
* sapi/include/confdefs.h, score/Makefile.am, score/preinstall.am: Add
Simple Priority Scheduler as complement to existing Deterministic
Priority Scheduler. This scheduler serves both as an example and as a
lighter weight implementation for smaller systems.
* score/include/rtems/score/schedulersimple.h,
score/inline/rtems/score/schedulersimple.inl,
score/src/schedulersimple.c, score/src/schedulersimpleblock.c,
score/src/schedulersimpleenqueue.c,
score/src/schedulersimpleenqueuefirst.c,
score/src/schedulersimpleextract.c,
score/src/schedulersimplereadyqueueenqueue.c,
score/src/schedulersimplereadyqueueenqueuefirst.c,
score/src/schedulersimpleschedule.c,
score/src/schedulersimpleunblock.c, score/src/schedulersimpleyield.c:
New files.
Diffstat (limited to 'cpukit/score/src/schedulersimplereadyqueueenqueue.c')
-rw-r--r-- | cpukit/score/src/schedulersimplereadyqueueenqueue.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/cpukit/score/src/schedulersimplereadyqueueenqueue.c b/cpukit/score/src/schedulersimplereadyqueueenqueue.c new file mode 100644 index 0000000000..788f94b20b --- /dev/null +++ b/cpukit/score/src/schedulersimplereadyqueueenqueue.c @@ -0,0 +1,48 @@ +/* + * Schedule Simple Handler / Ready Queue Enqueue + * + * COPYRIGHT (c) 2011. + * 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.com/license/LICENSE. + * + * $Id$ + */ + +#if HAVE_CONFIG_H +#include "config.h" +#endif + +#include <rtems/system.h> +#include <rtems/score/chain.h> +#include <rtems/score/isr.h> +#include <rtems/score/thread.h> +#include <rtems/score/schedulersimple.h> + +void _Scheduler_simple_Ready_queue_Enqueue( + Thread_Control *the_thread +) +{ + Chain_Control *ready; + Chain_Node *the_node; + Thread_Control *current; + + ready = (Chain_Control *)_Scheduler.information; + the_node = _Chain_First( ready ); + current = (Thread_Control *)ready; + + for ( ; !_Chain_Is_tail( ready, the_node ) ; the_node = the_node->next ) { + current = (Thread_Control *) the_node; + + /* break when AT END OR PAST our priority */ + if ( the_thread->current_priority < current->current_priority ) { + current = (Thread_Control *)current->Object.Node.previous; + break; + } + } + + /* enqueue */ + _Chain_Insert_unprotected( (Chain_Node *)current, &the_thread->Object.Node ); +} |