git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@1226 35acf78f-673a-0410-8e92-d51de3d6d3f4

docs/Doxyfile

@@ -1299,14 +1299,13 @@ PREDEFINED             = __DOXYGEN__ \
                          CH_USE_WAITEXIT=1 \
                          CH_USE_SEMAPHORES=1 \
                          CH_USE_SEMSW=1 \
-                         CH_USE_SEMAPHORES_TIMEOUT=1 \
                          CH_USE_MUTEXES=1 \
                          CH_USE_CONDVARS=1 \
                          CH_USE_CONDVARS_TIMEOUT=1 \
                          CH_USE_EVENTS=1 \
                          CH_USE_EVENTS_TIMEOUT=1 \
                          CH_USE_QUEUES=1 \
-                         CH_USE_SERIAL_FULLDUPLEX=1 \
+                         CH_USE_MEMCORE=1 \
                          CH_USE_HEAP=1 \
                          CH_USE_MEMPOOLS=1 \
                          CH_USE_MESSAGES=1 \

docs/src/concepts.dox

@@ -35,7 +35,7 @@
  * @a ch\<group\>\<action\>\<suffix\>().
  * The possible groups are: @a Sys, @a Sch, @a Time, @a VT, @a Thd, @a Sem,
  * @a Mtx, @a Cond, @a Evt, @a Msg, @a IQ, @a OQ, @a IO, @a Dbg,
- * @a Heap, @a Pool.
+ * @a Core, @a Heap, @a Pool.
  *
  * @section api_suffixes API Names Suffixes
  * The suffix can be one of the following:

os/kernel/include/memcore.h

@@ -27,10 +27,8 @@
 #ifndef _MEMCORE_H_
 #define _MEMCORE_H_
 
-#if CH_USE_MEMCORE
-
 /**
- * @brief Memory alignment type.
+ * @brief Memory alignment type.
  */
 typedef void *align_t;
 
@@ -42,21 +40,23 @@ typedef void *align_t;
 typedef void *(*memgetfunc_t)(size_t size);
 
 /**
- * @brief Alignment mask constant.
+ * @brief Alignment mask constant.
  */
 #define MEM_ALIGN_MASK      (sizeof(align_t) - 1)
 
 /**
- * @brief Alignment helper macro.
+ * @brief Alignment helper macro.
  */
 #define MEM_ALIGN_SIZE(p)   (((size_t)(p) + MEM_ALIGN_MASK) & ~MEM_ALIGN_MASK)
 
 /**
  * @brief Returns whatever a pointer or memory size is aligned to
- *        the type @p align_t.
+ *        the type @p align_t.
  */
 #define MEM_IS_ALIGNED(p)   (((size_t)(p) & MEM_ALIGN_MASK) == 0)
 
+#if CH_USE_MEMCORE
+
 #ifdef __cplusplus
 extern "C" {
 #endif

os/kernel/include/mempools.h

@@ -40,14 +40,19 @@ struct pool_header {
  * @brief Memory pool descriptor.
  */
 typedef struct {
-  struct pool_header    *mp_next;       /**< Pointer to the header.*/
+  struct pool_header    *mp_next;       /**< Pointer to the header.         */
-  size_t                mp_object_size; /**< Memory pool objects size.*/
+  size_t                mp_object_size; /**< Memory pool objects size.      */
+#if CH_USE_MEMCORE
+  bool_t                mp_usecore;     /**< Feed from the memory code
+                                             allocator if empty.            */
+#endif
 } MemoryPool;
 
 /**
  * @brief Data part of a static memory pool initializer.
  * @details This macro should be used when statically initializing a
  *          memory pool that is part of a bigger structure.
+ *
  * @param name the name of the memory pool variable
  * @param size size of the memory pool contained objects
  */
@@ -57,12 +62,25 @@ typedef struct {
  * @brief Static memory pool initializer.
  * @details Statically initialized memory pools require no explicit
  *          initialization using @p chPoolInit().
+ *
  * @param name the name of the memory pool variable
  * @param size size of the memory pool contained objects
  */
 #define MEMORYPOOL_DECL(name, size)                                     \
   MemoryPool name = _MEMORYPOOL_DATA(name, size)
 
+#if CH_USE_MEMCORE || defined(__DOXYGEN__)
+/**
+ * @brief Enables or disables the hungry mode.
+ * @details If enabled, the hungry mode, makes an empty memory pool feed
+ *          new objects from the core memory manager.
+ *
+ * @param[in] mp pointer to a @p MemoryPool structure
+ * @param[in] mode hungry mode flag
+ */
+#define chPoolSetHungryMode(mp, mode) ((mp)->mp_usecore = (mode))
+#endif
+
 #ifdef __cplusplus
 extern "C" {
 #endif

os/kernel/kernel.dox

@@ -230,7 +230,28 @@
  */
 
 /**
- * @defgroup heap Heap
+ * @defgroup memcore Core Memory Manager
+ * Core Memory Manager related APIs.
+ * <h2>Operation mode</h2>
+ * The core memory manager is a simplified allocator that only allows to
+ * allocate memory blocks without the possibility to free them.<br>
+ * This allocator is meant as a memory blocks provider for the other
+ * allocators such as:
+ * - C-Runtime allocator.
+ * - Heap allocator (see @ref heaps).
+ * - @ref Memory pools allocator (see @ref pools).
+ * .
+ * By having a centralized memory provider the various allocators can coexist
+ * and share the main memory.<br>
+ * This allocator, alone, is also useful for very simple applications that
+ * just require a simple way to get memory blocks.<br>
+ * In order to use the core memory manager APIs the @p CH_USE_MEMCORE option
+ * must be specified in @p chconf.h.
+ * @ingroup memory
+ */
+
+/**
+ * @defgroup heaps Heaps
  * Heap Allocator related APIs.
  * <h2>Operation mode</h2>
  * The heap allocator implements a first-fit strategy and its APIs are

os/kernel/src/chmemcore.c

@@ -60,7 +60,7 @@ void core_init(void) {
  *          <code>sizeof(align_t)</code>.
  *
  *
- * @param[in] the size of the block to be allocated
+ * @param[in] size the size of the block to be allocated
  * @return A pointer to the allocated memory block.
  * @retval NULL allocation failed, core memory exhausted.
  */
@@ -79,7 +79,7 @@ void *chCoreAlloc(size_t size) {
  *          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.
+ * @param[in] size the size of the block to be allocated.
  * @return A pointer to the allocated memory block.
  * @retval NULL allocation failed, core memory exhausted.
  */

os/kernel/src/chmempools.c

@@ -32,14 +32,20 @@
  *
  * @param[out] mp pointer to a @p MemoryPool structure
  * @param[in] size the size of the objects contained in this memory pool,
- *                 the minimum accepted size is the size of a pointer to void
+ *                 the minimum accepted size is the size of a pointer to void.
+ *
+ * @note The size is internally aligned to be a multiple of the @p align_t
+ *       type size.
  */
 void chPoolInit(MemoryPool *mp, size_t size) {
 
   chDbgCheck((mp != NULL) && (size >= sizeof(void *)), "chPoolInit");
 
   mp->mp_next = NULL;
-  mp->mp_object_size = size;
+  mp->mp_object_size = MEM_ALIGN_SIZE(size);
+#if CH_USE_MEMCORE
+  mp->mp_usecore = FALSE;
+#endif
 }
 
 /**
@@ -56,7 +62,10 @@ void *chPoolAllocI(MemoryPool *mp) {
 
   if ((objp = mp->mp_next) != NULL)
     mp->mp_next = mp->mp_next->ph_next;
-
+#if CH_USE_MEMCORE
+  else if (mp->mp_usecore)
+    objp = chCoreAllocI(mp->mp_object_size);
+#endif
   return objp;
 }
 
@@ -81,13 +90,17 @@ void *chPoolAlloc(MemoryPool *mp) {
  *
  * @param[in] mp pointer to a @p MemoryPool structure
  * @param[in] objp the pointer to the object to be released or added
- * @note the object is assumed to be of the right size for the specified
+ *
+ * @note The object is assumed to be of the right size for the specified
  *       memory pool.
+ * @note The object is assumed to be memory aligned to the size of @p align_t
+ *       type.
  */
 void chPoolFreeI(MemoryPool *mp, void *objp) {
   struct pool_header *php = objp;
 
-  chDbgCheck((mp != NULL) && (objp != NULL), "chPoolFreeI");
+  chDbgCheck((mp != NULL) && (objp != NULL) && MEM_IS_ALIGNED(objp),
+             "chPoolFreeI");
 
   php->ph_next = mp->mp_next;
   mp->mp_next = php;

readme.txt

@@ -7,11 +7,13 @@
   Removed the old EMAC driver, updated the uIP WEB demo to use the new
   driver model.
 - NEW: Added a simple lwIP demo (web server) for the AT91SAM7X.
-- NEW: Centralized memory heap manager. This simple allocator implements a
+- NEW: Centralized core memory manager. This simple allocator implements a
   sbrk()-like API: chCoreAlloc(). The other allocators now use this manager
   in order to get memory blocks.
 - NEW: The heap allocator has been modified, now it is possible to have
   multiple heaps. The default heap gets its memory from the new heap manager.
+- NEW: Added a "hungry" mode to the memory pools allocator, when enabled, this
+  mode makes a memory pool to feed memory from the core memory manager.
 - CHANGE: Because the changes in the allocators some API prototypes changed:
   chHeapAlloc(), chHeapStatus(), chThdCreateFromHeap().
 - CHANGE: Because the changes in the allocators some configuration options

test/test.h

@@ -47,6 +47,7 @@ struct testcase {
   void (*execute)(void);
 };
 
+#ifndef __DOXYGEN__
 union test_buffers {
   struct {
     WORKING_AREA(waT0, THREADS_STACK_SIZE);
@@ -57,6 +58,7 @@ union test_buffers {
   };
   uint8_t buffer[WA_SIZE * 5];
 };
+#endif
 
 #ifdef __cplusplus
 extern "C" {

test/testheap.c

@@ -85,7 +85,7 @@ static void heap1_execute(void) {
   p1 = chHeapAlloc(NULL, SIZE);
   test_assert(1, p1 != NULL, "allocation failed");
   chHeapFree(p1);
-  p1 = chHeapAlloc(NULL, 0x1000000);
+  p1 = chHeapAlloc(NULL, (size_t)-256);
   test_assert(2, p1 == NULL, "allocation not failed");
 
   /* Initial local heap state.*/