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| author | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2009-10-16 17:45:19 +0000 |
|---|---|---|
| committer | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2009-10-16 17:45:19 +0000 |
| commit | 2c46df1916a25b7880416aee974a518cc607717a (patch) | |
| tree | 87cac3a4daccc11dcfa281e2f59fa866ae257bc1 /os/kernel/src/chmemcore.c | |
| parent | 8da7f367eeb3dc4dd71a10f7e7f18efe785c554f (diff) | |
| download | ChibiOS-2c46df1916a25b7880416aee974a518cc607717a.tar.gz ChibiOS-2c46df1916a25b7880416aee974a518cc607717a.tar.bz2 ChibiOS-2c46df1916a25b7880416aee974a518cc607717a.zip | |
New heap manager.
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@1221 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'os/kernel/src/chmemcore.c')
| -rw-r--r-- | os/kernel/src/chmemcore.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/os/kernel/src/chmemcore.c b/os/kernel/src/chmemcore.c new file mode 100644 index 000000000..87ef6037a --- /dev/null +++ b/os/kernel/src/chmemcore.c @@ -0,0 +1,99 @@ +/*
+ 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 chmemcore.c
+ * @brief Core memory manager code.
+ * @addtogroup memcore
+ * @{
+ */
+
+#include <ch.h>
+
+#if CH_USE_MEMCORE
+
+#if CH_MEMCORE_SIZE == 0
+ extern align_t __heap_base__;
+ extern align_t __heap_end__;
+#else
+align_t buffer[ALIGN_SIZE(CH_MEMCORE_SIZE) / sizeof(align_t)];
+#endif
+
+static align_t *nextmem;
+static align_t *endmem;
+
+/**
+ * @brief Low level memory manager initialization. + *
+ * @note Internal use only.
+ */
+void core_init(void) {
+#if CH_MEMCORE_SIZE == 0
+ nextmem = &__heap_base__;
+ endmem = &__heap_end__;
+#else
+ nextmem = &buffer[0];
+ endmem = &buffer[ALIGN_SIZE(CH_MEMCORE_SIZE) / sizeof(align_t)];
+#endif
+}
+
+/**
+ * @brief Allocates a block of memory.
+ * @details The size of the returned block is aligned to the alignment
+ * type @p align_t so it is not possible to allocate less than
+ * <code>sizeof(align_t)</code>.
+ *
+ *
+ * @param[in] the size of the block to be allocated
+ * @return A pointer to the allocated memory block.
+ * @retval NULL allocation failed, core memory exhausted. + */
+void *chCoreAlloc(size_t size) {
+ void *p;
+
+ chSysLock();
+ p = chCoreAllocI(size);
+ chSysUnlock();
+ return p;
+}
+
+/**
+ * @brief Allocates a block of memory.
+ * @details The size of the returned block is aligned to the alignment
+ * type @p align_t so it is not possible to allocate less than
+ * <code>sizeof(align_t)</code>.
+ *
+ * @param[in] the size of the block to be allocated.
+ * @return A pointer to the allocated memory block.
+ * @retval NULL allocation failed, core memory exhausted.
+ */
+void *chCoreAllocI(size_t size) {
+ void *p;
+
+ size = MEM_ALIGN_SIZE(size);
+ if (nextmem + size > endmem)
+ return NULL;
+ p = nextmem;
+ nextmem += size;
+ return p;
+}
+
+#endif /* CH_USE_MEMCORE */
+
+/** @} */
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