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fixed coding style in src/mem.c 

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2523 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
dzzxzz@gmail.com 2012-12-25 08:27:29 +00:00
parent 55f1cb72b6
commit 07ea5e8fec
1 changed files with 290 additions and 275 deletions
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565
src/mem.c
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@ -74,7 +74,7 @@ static void (*rt_free_hook)(void *ptr);
*/
void rt_malloc_sethook(void (*hook)(void *ptr, rt_size_t size))
{
rt_malloc_hook = hook;
rt_malloc_hook = hook;
}
/**
@ -85,7 +85,7 @@ void rt_malloc_sethook(void (*hook)(void *ptr, rt_size_t size))
*/
void rt_free_sethook(void (*hook)(void *ptr))
{
rt_free_hook = hook;
rt_free_hook = hook;
}
/*@}*/
@ -95,11 +95,11 @@ void rt_free_sethook(void (*hook)(void *ptr))
#define HEAP_MAGIC 0x1ea0
struct heap_mem
{
/* magic and used flag */
rt_uint16_t magic;
rt_uint16_t used;
/* magic and used flag */
rt_uint16_t magic;
rt_uint16_t used;
rt_size_t next, prev;
rt_size_t next, prev;
};
/** pointer to the heap: for alignment, heap_ptr is now a pointer instead of an array */
@ -123,38 +123,42 @@ static rt_size_t used_mem, max_mem;
static void plug_holes(struct heap_mem *mem)
{
struct heap_mem *nmem;
struct heap_mem *pmem;
struct heap_mem *nmem;
struct heap_mem *pmem;
RT_ASSERT((rt_uint8_t *)mem >= heap_ptr);
RT_ASSERT((rt_uint8_t *)mem < (rt_uint8_t *)heap_end);
RT_ASSERT(mem->used == 0);
RT_ASSERT((rt_uint8_t *)mem >= heap_ptr);
RT_ASSERT((rt_uint8_t *)mem < (rt_uint8_t *)heap_end);
RT_ASSERT(mem->used == 0);
/* plug hole forward */
nmem = (struct heap_mem *)&heap_ptr[mem->next];
if (mem != nmem && nmem->used == 0 && (rt_uint8_t *)nmem != (rt_uint8_t *)heap_end)
{
/* if mem->next is unused and not end of heap_ptr, combine mem and mem->next */
if (lfree == nmem)
{
lfree = mem;
}
mem->next = nmem->next;
((struct heap_mem *)&heap_ptr[nmem->next])->prev = (rt_uint8_t *)mem - heap_ptr;
}
/* plug hole forward */
nmem = (struct heap_mem *)&heap_ptr[mem->next];
if (mem != nmem &&
nmem->used == 0 &&
(rt_uint8_t *)nmem != (rt_uint8_t *)heap_end)
{
/* if mem->next is unused and not end of heap_ptr,
* combine mem and mem->next
*/
if (lfree == nmem)
{
lfree = mem;
}
mem->next = nmem->next;
((struct heap_mem *)&heap_ptr[nmem->next])->prev = (rt_uint8_t *)mem - heap_ptr;
}
/* plug hole backward */
pmem = (struct heap_mem *)&heap_ptr[mem->prev];
if (pmem != mem && pmem->used == 0)
{
/* if mem->prev is unused, combine mem and mem->prev */
if (lfree == mem)
{
lfree = pmem;
}
pmem->next = mem->next;
((struct heap_mem *)&heap_ptr[mem->next])->prev = (rt_uint8_t *)pmem - heap_ptr;
}
/* plug hole backward */
pmem = (struct heap_mem *)&heap_ptr[mem->prev];
if (pmem != mem && pmem->used == 0)
{
/* if mem->prev is unused, combine mem and mem->prev */
if (lfree == mem)
{
lfree = pmem;
}
pmem->next = mem->next;
((struct heap_mem *)&heap_ptr[mem->next])->prev = (rt_uint8_t *)pmem - heap_ptr;
}
}
/**
@ -167,50 +171,51 @@ static void plug_holes(struct heap_mem *mem)
*/
void rt_system_heap_init(void *begin_addr, void *end_addr)
{
struct heap_mem *mem;
rt_uint32_t begin_align = RT_ALIGN((rt_uint32_t)begin_addr, RT_ALIGN_SIZE);
rt_uint32_t end_align = RT_ALIGN_DOWN((rt_uint32_t)end_addr, RT_ALIGN_SIZE);
struct heap_mem *mem;
rt_uint32_t begin_align = RT_ALIGN((rt_uint32_t)begin_addr, RT_ALIGN_SIZE);
rt_uint32_t end_align = RT_ALIGN_DOWN((rt_uint32_t)end_addr, RT_ALIGN_SIZE);
RT_DEBUG_NOT_IN_INTERRUPT;
RT_DEBUG_NOT_IN_INTERRUPT;
/* alignment addr */
if ((end_align > (2 * SIZEOF_STRUCT_MEM)) &&
((end_align - 2 * SIZEOF_STRUCT_MEM) >= begin_align))
{
/* calculate the aligned memory size */
mem_size_aligned = end_align - begin_align - 2 * SIZEOF_STRUCT_MEM;
}
else
{
rt_kprintf("mem init, error begin address 0x%x, and end address 0x%x\n", (rt_uint32_t)begin_addr, (rt_uint32_t)end_addr);
return;
}
/* alignment addr */
if ((end_align > (2 * SIZEOF_STRUCT_MEM)) &&
((end_align - 2 * SIZEOF_STRUCT_MEM) >= begin_align))
{
/* calculate the aligned memory size */
mem_size_aligned = end_align - begin_align - 2 * SIZEOF_STRUCT_MEM;
}
else
{
rt_kprintf("mem init, error begin address 0x%x, and end address 0x%x\n",
(rt_uint32_t)begin_addr, (rt_uint32_t)end_addr);
/* point to begin address of heap */
heap_ptr = (rt_uint8_t *)begin_align;
return;
}
RT_DEBUG_LOG(RT_DEBUG_MEM, ("mem init, heap begin address 0x%x, size %d\n",
/* point to begin address of heap */
heap_ptr = (rt_uint8_t *)begin_align;
RT_DEBUG_LOG(RT_DEBUG_MEM, ("mem init, heap begin address 0x%x, size %d\n",
(rt_uint32_t)heap_ptr, mem_size_aligned));
/* initialize the start of the heap */
mem = (struct heap_mem *)heap_ptr;
mem->magic= HEAP_MAGIC;
mem->next = mem_size_aligned + SIZEOF_STRUCT_MEM;
mem->prev = 0;
mem->used = 0;
/* initialize the start of the heap */
mem = (struct heap_mem *)heap_ptr;
mem->magic = HEAP_MAGIC;
mem->next = mem_size_aligned + SIZEOF_STRUCT_MEM;
mem->prev = 0;
mem->used = 0;
/* initialize the end of the heap */
heap_end = (struct heap_mem *)&heap_ptr[mem->next];
heap_end->magic= HEAP_MAGIC;
heap_end->used = 1;
heap_end->next = mem_size_aligned + SIZEOF_STRUCT_MEM;
heap_end->prev = mem_size_aligned + SIZEOF_STRUCT_MEM;
/* initialize the end of the heap */
heap_end = (struct heap_mem *)&heap_ptr[mem->next];
heap_end->magic = HEAP_MAGIC;
heap_end->used = 1;
heap_end->next = mem_size_aligned + SIZEOF_STRUCT_MEM;
heap_end->prev = mem_size_aligned + SIZEOF_STRUCT_MEM;
rt_sem_init(&heap_sem, "heap", 1, RT_IPC_FLAG_FIFO);
rt_sem_init(&heap_sem, "heap", 1, RT_IPC_FLAG_FIFO);
/* initialize the lowest-free pointer to the start of the heap */
lfree = (struct heap_mem *)heap_ptr;
/* initialize the lowest-free pointer to the start of the heap */
lfree = (struct heap_mem *)heap_ptr;
}
/**
@ -228,129 +233,132 @@ void rt_system_heap_init(void *begin_addr, void *end_addr)
*/
void *rt_malloc(rt_size_t size)
{
rt_size_t ptr, ptr2;
struct heap_mem *mem, *mem2;
rt_size_t ptr, ptr2;
struct heap_mem *mem, *mem2;
RT_DEBUG_NOT_IN_INTERRUPT;
RT_DEBUG_NOT_IN_INTERRUPT;
if (size == 0)
return RT_NULL;
if (size == 0)
return RT_NULL;
if (size != RT_ALIGN(size, RT_ALIGN_SIZE))
RT_DEBUG_LOG(RT_DEBUG_MEM, ("malloc size %d, but align to %d\n",
if (size != RT_ALIGN(size, RT_ALIGN_SIZE))
RT_DEBUG_LOG(RT_DEBUG_MEM, ("malloc size %d, but align to %d\n",
size, RT_ALIGN(size, RT_ALIGN_SIZE)));
else
RT_DEBUG_LOG(RT_DEBUG_MEM, ("malloc size %d\n", size));
else
RT_DEBUG_LOG(RT_DEBUG_MEM, ("malloc size %d\n", size));
/* alignment size */
size = RT_ALIGN(size, RT_ALIGN_SIZE);
/* alignment size */
size = RT_ALIGN(size, RT_ALIGN_SIZE);
if (size > mem_size_aligned)
{
RT_DEBUG_LOG(RT_DEBUG_MEM, ("no memory\n"));
if (size > mem_size_aligned)
{
RT_DEBUG_LOG(RT_DEBUG_MEM, ("no memory\n"));
return RT_NULL;
}
return RT_NULL;
}
/* every data block must be at least MIN_SIZE_ALIGNED long */
if (size < MIN_SIZE_ALIGNED)
size = MIN_SIZE_ALIGNED;
/* every data block must be at least MIN_SIZE_ALIGNED long */
if (size < MIN_SIZE_ALIGNED)
size = MIN_SIZE_ALIGNED;
/* take memory semaphore */
rt_sem_take(&heap_sem, RT_WAITING_FOREVER);
/* take memory semaphore */
rt_sem_take(&heap_sem, RT_WAITING_FOREVER);
for (ptr = (rt_uint8_t *)lfree - heap_ptr; ptr < mem_size_aligned - size;
ptr = ((struct heap_mem *)&heap_ptr[ptr])->next)
{
mem = (struct heap_mem *)&heap_ptr[ptr];
for (ptr = (rt_uint8_t *)lfree - heap_ptr;
ptr < mem_size_aligned - size;
ptr = ((struct heap_mem *)&heap_ptr[ptr])->next)
{
mem = (struct heap_mem *)&heap_ptr[ptr];
if ((!mem->used) && (mem->next - (ptr + SIZEOF_STRUCT_MEM)) >= size)
{
/* mem is not used and at least perfect fit is possible:
* mem->next - (ptr + SIZEOF_STRUCT_MEM) gives us the 'user data size' of mem */
if ((!mem->used) && (mem->next - (ptr + SIZEOF_STRUCT_MEM)) >= size)
{
/* mem is not used and at least perfect fit is possible:
* mem->next - (ptr + SIZEOF_STRUCT_MEM) gives us the 'user data size' of mem */
if (mem->next - (ptr + SIZEOF_STRUCT_MEM) >= (size + SIZEOF_STRUCT_MEM + MIN_SIZE_ALIGNED))
{
/* (in addition to the above, we test if another struct heap_mem (SIZEOF_STRUCT_MEM) containing
* at least MIN_SIZE_ALIGNED of data also fits in the 'user data space' of 'mem')
* -> split large block, create empty remainder,
* remainder must be large enough to contain MIN_SIZE_ALIGNED data: if
* mem->next - (ptr + (2*SIZEOF_STRUCT_MEM)) == size,
* struct heap_mem would fit in but no data between mem2 and mem2->next
* @todo we could leave out MIN_SIZE_ALIGNED. We would create an empty
* region that couldn't hold data, but when mem->next gets freed,
* the 2 regions would be combined, resulting in more free memory
*/
ptr2 = ptr + SIZEOF_STRUCT_MEM + size;
if (mem->next - (ptr + SIZEOF_STRUCT_MEM) >=
(size + SIZEOF_STRUCT_MEM + MIN_SIZE_ALIGNED))
{
/* (in addition to the above, we test if another struct heap_mem (SIZEOF_STRUCT_MEM) containing
* at least MIN_SIZE_ALIGNED of data also fits in the 'user data space' of 'mem')
* -> split large block, create empty remainder,
* remainder must be large enough to contain MIN_SIZE_ALIGNED data: if
* mem->next - (ptr + (2*SIZEOF_STRUCT_MEM)) == size,
* struct heap_mem would fit in but no data between mem2 and mem2->next
* @todo we could leave out MIN_SIZE_ALIGNED. We would create an empty
* region that couldn't hold data, but when mem->next gets freed,
* the 2 regions would be combined, resulting in more free memory
*/
ptr2 = ptr + SIZEOF_STRUCT_MEM + size;
/* create mem2 struct */
mem2 = (struct heap_mem *)&heap_ptr[ptr2];
mem2->used = 0;
mem2->next = mem->next;
mem2->prev = ptr;
/* create mem2 struct */
mem2 = (struct heap_mem *)&heap_ptr[ptr2];
mem2->used = 0;
mem2->next = mem->next;
mem2->prev = ptr;
/* and insert it between mem and mem->next */
mem->next = ptr2;
mem->used = 1;
/* and insert it between mem and mem->next */
mem->next = ptr2;
mem->used = 1;
if (mem2->next != mem_size_aligned + SIZEOF_STRUCT_MEM)
{
((struct heap_mem *)&heap_ptr[mem2->next])->prev = ptr2;
}
if (mem2->next != mem_size_aligned + SIZEOF_STRUCT_MEM)
{
((struct heap_mem *)&heap_ptr[mem2->next])->prev = ptr2;
}
#ifdef RT_MEM_STATS
used_mem += (size + SIZEOF_STRUCT_MEM);
if (max_mem < used_mem)
max_mem = used_mem;
used_mem += (size + SIZEOF_STRUCT_MEM);
if (max_mem < used_mem)
max_mem = used_mem;
#endif
}
else
{
/* (a mem2 struct does no fit into the user data space of mem and mem->next will always
* be used at this point: if not we have 2 unused structs in a row, plug_holes should have
* take care of this).
* -> near fit or excact fit: do not split, no mem2 creation
* also can't move mem->next directly behind mem, since mem->next
* will always be used at this point!
*/
mem->used = 1;
}
else
{
/* (a mem2 struct does no fit into the user data space of mem and mem->next will always
* be used at this point: if not we have 2 unused structs in a row, plug_holes should have
* take care of this).
* -> near fit or excact fit: do not split, no mem2 creation
* also can't move mem->next directly behind mem, since mem->next
* will always be used at this point!
*/
mem->used = 1;
#ifdef RT_MEM_STATS
used_mem += mem->next - ((rt_uint8_t*)mem - heap_ptr);
if (max_mem < used_mem)
max_mem = used_mem;
used_mem += mem->next - ((rt_uint8_t*)mem - heap_ptr);
if (max_mem < used_mem)
max_mem = used_mem;
#endif
}
/* set memory block magic */
mem->magic = HEAP_MAGIC;
}
/* set memory block magic */
mem->magic = HEAP_MAGIC;
if (mem == lfree)
{
/* Find next free block after mem and update lowest free pointer */
while (lfree->used && lfree != heap_end)
lfree = (struct heap_mem *)&heap_ptr[lfree->next];
if (mem == lfree)
{
/* Find next free block after mem and update lowest free pointer */
while (lfree->used && lfree != heap_end)
lfree = (struct heap_mem *)&heap_ptr[lfree->next];
RT_ASSERT(((lfree == heap_end) || (!lfree->used)));
}
RT_ASSERT(((lfree == heap_end) || (!lfree->used)));
}
rt_sem_release(&heap_sem);
RT_ASSERT((rt_uint32_t)mem + SIZEOF_STRUCT_MEM + size <= (rt_uint32_t)heap_end);
RT_ASSERT((rt_uint32_t)((rt_uint8_t *)mem + SIZEOF_STRUCT_MEM) % RT_ALIGN_SIZE == 0);
RT_ASSERT((((rt_uint32_t)mem) & (RT_ALIGN_SIZE-1)) == 0);
rt_sem_release(&heap_sem);
RT_ASSERT((rt_uint32_t)mem + SIZEOF_STRUCT_MEM + size <= (rt_uint32_t)heap_end);
RT_ASSERT((rt_uint32_t)((rt_uint8_t *)mem + SIZEOF_STRUCT_MEM) % RT_ALIGN_SIZE == 0);
RT_ASSERT((((rt_uint32_t)mem) & (RT_ALIGN_SIZE-1)) == 0);
RT_DEBUG_LOG(RT_DEBUG_MEM,
RT_DEBUG_LOG(RT_DEBUG_MEM,
("allocate memory at 0x%x, size: %d\n",
(rt_uint32_t)((rt_uint8_t *)mem + SIZEOF_STRUCT_MEM),
(rt_uint32_t)(mem->next - ((rt_uint8_t *)mem - heap_ptr))));
RT_OBJECT_HOOK_CALL(rt_malloc_hook, (((void*)((rt_uint8_t *)mem + SIZEOF_STRUCT_MEM)), size));
/* return the memory data except mem struct */
return (rt_uint8_t *)mem + SIZEOF_STRUCT_MEM;
}
}
RT_OBJECT_HOOK_CALL(rt_malloc_hook,
(((void *)((rt_uint8_t *)mem + SIZEOF_STRUCT_MEM)), size));
rt_sem_release(&heap_sem);
return RT_NULL;
/* return the memory data except mem struct */
return (rt_uint8_t *)mem + SIZEOF_STRUCT_MEM;
}
}
rt_sem_release(&heap_sem);
return RT_NULL;
}
RTM_EXPORT(rt_malloc);
@ -364,85 +372,85 @@ RTM_EXPORT(rt_malloc);
*/
void *rt_realloc(void *rmem, rt_size_t newsize)
{
rt_size_t size;
rt_size_t ptr, ptr2;
struct heap_mem *mem, *mem2;
void *nmem;
rt_size_t size;
rt_size_t ptr, ptr2;
struct heap_mem *mem, *mem2;
void *nmem;
RT_DEBUG_NOT_IN_INTERRUPT;
RT_DEBUG_NOT_IN_INTERRUPT;
/* alignment size */
newsize = RT_ALIGN(newsize, RT_ALIGN_SIZE);
if (newsize > mem_size_aligned)
{
RT_DEBUG_LOG(RT_DEBUG_MEM, ("realloc: out of memory\n"));
/* alignment size */
newsize = RT_ALIGN(newsize, RT_ALIGN_SIZE);
if (newsize > mem_size_aligned)
{
RT_DEBUG_LOG(RT_DEBUG_MEM, ("realloc: out of memory\n"));
return RT_NULL;
}
return RT_NULL;
}
/* allocate a new memory block */
if (rmem == RT_NULL)
return rt_malloc(newsize);
/* allocate a new memory block */
if (rmem == RT_NULL)
return rt_malloc(newsize);
rt_sem_take(&heap_sem, RT_WAITING_FOREVER);
rt_sem_take(&heap_sem, RT_WAITING_FOREVER);
if ((rt_uint8_t *)rmem < (rt_uint8_t *)heap_ptr ||
(rt_uint8_t *)rmem >= (rt_uint8_t *)heap_end)
{
/* illegal memory */
rt_sem_release(&heap_sem);
if ((rt_uint8_t *)rmem < (rt_uint8_t *)heap_ptr ||
(rt_uint8_t *)rmem >= (rt_uint8_t *)heap_end)
{
/* illegal memory */
rt_sem_release(&heap_sem);
return rmem;
}
return rmem;
}
mem = (struct heap_mem *)((rt_uint8_t *)rmem - SIZEOF_STRUCT_MEM);
mem = (struct heap_mem *)((rt_uint8_t *)rmem - SIZEOF_STRUCT_MEM);
ptr = (rt_uint8_t *)mem - heap_ptr;
size = mem->next - ptr - SIZEOF_STRUCT_MEM;
if (size == newsize)
{
/* the size is the same as */
rt_sem_release(&heap_sem);
ptr = (rt_uint8_t *)mem - heap_ptr;
size = mem->next - ptr - SIZEOF_STRUCT_MEM;
if (size == newsize)
{
/* the size is the same as */
rt_sem_release(&heap_sem);
return rmem;
}
return rmem;
}
if (newsize + SIZEOF_STRUCT_MEM + MIN_SIZE < size)
{
/* split memory block */
if (newsize + SIZEOF_STRUCT_MEM + MIN_SIZE < size)
{
/* split memory block */
#ifdef RT_MEM_STATS
used_mem -= (size - newsize);
used_mem -= (size - newsize);
#endif
ptr2 = ptr + SIZEOF_STRUCT_MEM + newsize;
mem2 = (struct heap_mem *)&heap_ptr[ptr2];
mem2->magic= HEAP_MAGIC;
mem2->used = 0;
mem2->next = mem->next;
mem2->prev = ptr;
mem->next = ptr2;
if (mem2->next != mem_size_aligned + SIZEOF_STRUCT_MEM)
{
((struct heap_mem *)&heap_ptr[mem2->next])->prev = ptr2;
}
ptr2 = ptr + SIZEOF_STRUCT_MEM + newsize;
mem2 = (struct heap_mem *)&heap_ptr[ptr2];
mem2->magic= HEAP_MAGIC;
mem2->used = 0;
mem2->next = mem->next;
mem2->prev = ptr;
mem->next = ptr2;
if (mem2->next != mem_size_aligned + SIZEOF_STRUCT_MEM)
{
((struct heap_mem *)&heap_ptr[mem2->next])->prev = ptr2;
}
plug_holes(mem2);
plug_holes(mem2);
rt_sem_release(&heap_sem);
rt_sem_release(&heap_sem);
return rmem;
}
rt_sem_release(&heap_sem);
return rmem;
}
rt_sem_release(&heap_sem);
/* expand memory */
nmem = rt_malloc(newsize);
if (nmem != RT_NULL) /* check memory */
{
rt_memcpy(nmem, rmem, size < newsize ? size : newsize);
rt_free(rmem);
}
/* expand memory */
nmem = rt_malloc(newsize);
if (nmem != RT_NULL) /* check memory */
{
rt_memcpy(nmem, rmem, size < newsize ? size : newsize);
rt_free(rmem);
}
return nmem;
return nmem;
}
RTM_EXPORT(rt_realloc);
@ -460,98 +468,105 @@ RTM_EXPORT(rt_realloc);
*/
void *rt_calloc(rt_size_t count, rt_size_t size)
{
void *p;
void *p;
RT_DEBUG_NOT_IN_INTERRUPT;
RT_DEBUG_NOT_IN_INTERRUPT;
/* allocate 'count' objects of size 'size' */
p = rt_malloc(count * size);
/* allocate 'count' objects of size 'size' */
p = rt_malloc(count * size);
/* zero the memory */
if (p)
rt_memset(p, 0, count * size);
/* zero the memory */
if (p)
rt_memset(p, 0, count * size);
return p;
return p;
}
RTM_EXPORT(rt_calloc);
/**
* This function will release the previously allocated memory block by rt_malloc.
* The released memory block is taken back to system heap.
* This function will release the previously allocated memory block by
* rt_malloc. The released memory block is taken back to system heap.
*
* @param rmem the address of memory which will be released
*/
void rt_free(void *rmem)
{
struct heap_mem *mem;
struct heap_mem *mem;
RT_DEBUG_NOT_IN_INTERRUPT;
RT_DEBUG_NOT_IN_INTERRUPT;
if (rmem == RT_NULL)
return;
RT_ASSERT((((rt_uint32_t)rmem) & (RT_ALIGN_SIZE-1)) == 0);
RT_ASSERT((rt_uint8_t *)rmem >= (rt_uint8_t *)heap_ptr &&
(rt_uint8_t *)rmem < (rt_uint8_t *)heap_end);
if (rmem == RT_NULL)
return;
RT_ASSERT((((rt_uint32_t)rmem) & (RT_ALIGN_SIZE-1)) == 0);
RT_ASSERT((rt_uint8_t *)rmem >= (rt_uint8_t *)heap_ptr &&
(rt_uint8_t *)rmem < (rt_uint8_t *)heap_end);
RT_OBJECT_HOOK_CALL(rt_free_hook, (rmem));
RT_OBJECT_HOOK_CALL(rt_free_hook, (rmem));
if ((rt_uint8_t *)rmem < (rt_uint8_t *)heap_ptr || (rt_uint8_t *)rmem >= (rt_uint8_t *)heap_end)
{
RT_DEBUG_LOG(RT_DEBUG_MEM, ("illegal memory\n"));
if ((rt_uint8_t *)rmem < (rt_uint8_t *)heap_ptr ||
(rt_uint8_t *)rmem >= (rt_uint8_t *)heap_end)
{
RT_DEBUG_LOG(RT_DEBUG_MEM, ("illegal memory\n"));
return;
}
return;
}
/* Get the corresponding struct heap_mem ... */
mem = (struct heap_mem *)((rt_uint8_t *)rmem - SIZEOF_STRUCT_MEM);
/* Get the corresponding struct heap_mem ... */
mem = (struct heap_mem *)((rt_uint8_t *)rmem - SIZEOF_STRUCT_MEM);
RT_DEBUG_LOG(RT_DEBUG_MEM,
RT_DEBUG_LOG(RT_DEBUG_MEM,
("release memory 0x%x, size: %d\n",
(rt_uint32_t)rmem,
(rt_uint32_t)(mem->next - ((rt_uint8_t *)mem - heap_ptr))));
/* protect the heap from concurrent access */
rt_sem_take(&heap_sem, RT_WAITING_FOREVER);
/* protect the heap from concurrent access */
rt_sem_take(&heap_sem, RT_WAITING_FOREVER);
/* ... which has to be in a used state ... */
RT_ASSERT(mem->used);
RT_ASSERT(mem->magic == HEAP_MAGIC);
/* ... and is now unused. */
mem->used = 0;
mem->magic = 0;
/* ... which has to be in a used state ... */
RT_ASSERT(mem->used);
RT_ASSERT(mem->magic == HEAP_MAGIC);
/* ... and is now unused. */
mem->used = 0;
mem->magic = 0;
if (mem < lfree)
{
/* the newly freed struct is now the lowest */
lfree = mem;
}
if (mem < lfree)
{
/* the newly freed struct is now the lowest */
lfree = mem;
}
#ifdef RT_MEM_STATS
used_mem -= (mem->next - ((rt_uint8_t*)mem - heap_ptr));
used_mem -= (mem->next - ((rt_uint8_t*)mem - heap_ptr));
#endif
/* finally, see if prev or next are free also */
plug_holes(mem);
rt_sem_release(&heap_sem);
/* finally, see if prev or next are free also */
plug_holes(mem);
rt_sem_release(&heap_sem);
}
RTM_EXPORT(rt_free);
#ifdef RT_MEM_STATS
void rt_memory_info(rt_uint32_t *total, rt_uint32_t *used, rt_uint32_t *max_used)
void rt_memory_info(rt_uint32_t *total,
rt_uint32_t *used,
rt_uint32_t *max_used)
{
if (total != RT_NULL) *total = mem_size_aligned;
if (used != RT_NULL) *used = used_mem;
if (max_used != RT_NULL) *max_used = max_mem;
if (total != RT_NULL)
*total = mem_size_aligned;
if (used != RT_NULL)
*used = used_mem;
if (max_used != RT_NULL)
*max_used = max_mem;
}
#ifdef RT_USING_FINSH
#include <finsh.h>
void list_mem(void)
{
rt_kprintf("total memory: %d\n", mem_size_aligned);
rt_kprintf("used memory : %d\n", used_mem);
rt_kprintf("maximum allocated memory: %d\n", max_mem);
rt_kprintf("total memory: %d\n", mem_size_aligned);
rt_kprintf("used memory : %d\n", used_mem);
rt_kprintf("maximum allocated memory: %d\n", max_mem);
}
FINSH_FUNCTION_EXPORT(list_mem, list memory usage information)
#endif