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| author | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2010-02-02 21:27:53 +0000 |
|---|---|---|
| committer | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2010-02-02 21:27:53 +0000 |
| commit | ca20fd81f6f5cba290763cf08243f582841cf770 (patch) | |
| tree | 9b5bdddc5ce86f5ceb4d55f8d6f12fbebf82e4e4 /os/kernel/src | |
| parent | a5070b8e577dee21b30c7ef6918133344787f997 (diff) | |
| download | ChibiOS-ca20fd81f6f5cba290763cf08243f582841cf770.tar.gz ChibiOS-ca20fd81f6f5cba290763cf08243f582841cf770.tar.bz2 ChibiOS-ca20fd81f6f5cba290763cf08243f582841cf770.zip | |
Forgot files...
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@1560 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'os/kernel/src')
| -rw-r--r-- | os/kernel/src/chregistry.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/os/kernel/src/chregistry.c b/os/kernel/src/chregistry.c new file mode 100644 index 000000000..186d97e35 --- /dev/null +++ b/os/kernel/src/chregistry.c @@ -0,0 +1,77 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
+
+ This file is part of ChibiOS/RT.
+
+ ChibiOS/RT is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ ChibiOS/RT is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file chregistry.c
+ * @brief Threads registry code.
+ * @addtogroup registry
+ * @{
+ */
+#include "ch.h"
+
+#if CH_USE_REGISTRY
+
+/**
+ * @brief Returns the first thread in the system.
+ * @details Returns the most ancient thread in the system, usually this is
+ * the main thread unless it terminated.
+ * @note A reference is added to the returned thread in order to make sure
+ * it status is not lost.
+ *
+ * @return A reference to the first thread. + */
+Thread *chRegFirstThread(void) {
+ Thread *tp;
+
+ chSysLock();
+ (tp = rlist.p_newer)->p_refs++;
+ chSysUnlock();
+ return tp;
+}
+
+/**
+ * @brief Returns the thread next to the specified one.
+ * @details The reference counter of the specified thread is decremented and
+ * the reference counter of the returned thread is incremented.
+ * + * @param[in] tp pointer to the thread
+ * @return A reference to the next thread.
+ * @retval NULL if there is no next thread.
+ */
+Thread *chRegNextThread(Thread *tp) {
+
+ chSysLock();
+ chDbgAssert(tp->p_refs > 0, "chRegNextThread(), #1",
+ "not referenced");
+ tp->p_refs--;
+ if (tp->p_newer != (Thread *)&rlist) {
+ tp = tp->p_newer;
+ chDbgAssert(tp->p_refs < 255, "chRegNextThread(), #2",
+ "too many references");
+ tp->p_refs++;
+ }
+ else
+ tp = NULL;
+ chSysUnlock();
+ return tp;
+}
+
+#endif /* CH_USE_REGISTRY */
+
+/** @} */
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