fixed coding style in src/slab.c

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2527 bbd45198-f89e-11dd-88c7-29a3b14d5316

src/slab.c

@@ -216,7 +216,8 @@ struct memusage
     rt_uint32_t size:30;        /* pages allocated or offset from zone */
 };
 static struct memusage *memusage = RT_NULL;
-#define btokup(addr)	(&memusage[((rt_uint32_t)(addr) - heap_start) >> RT_MM_PAGE_BITS])
+#define btokup(addr)    \
+    (&memusage[((rt_uint32_t)(addr) - heap_start) >> RT_MM_PAGE_BITS])
 
 static rt_uint32_t heap_start, heap_end;
 
@@ -399,13 +400,15 @@ void rt_system_heap_init(void *begin_addr, void *end_addr)
  */
 rt_inline int zoneindex(rt_uint32_t *bytes)
 {
-	rt_uint32_t n = (rt_uint32_t)*bytes;	/* unsigned for shift opt */
+    /* unsigned for shift opt */
+    rt_uint32_t n = (rt_uint32_t)*bytes;
 
     if (n < 128)
     {
         *bytes = n = (n + 7) & ~7;
 
-		return(n / 8 - 1);		/* 8 byte chunks, 16 zones */
+        /* 8 byte chunks, 16 zones */
+        return(n / 8 - 1);
     }
     if (n < 256)
     {
@@ -718,7 +721,8 @@ void *rt_realloc(void *ptr, rt_size_t size)
     }
     else if (kup->type == PAGE_TYPE_SMALL)
     {
-		z = (slab_zone *)(((rt_uint32_t)ptr & ~RT_MM_PAGE_MASK) - kup->size * RT_MM_PAGE_SIZE);
+        z = (slab_zone *)(((rt_uint32_t)ptr & ~RT_MM_PAGE_MASK) -
+                          kup->size * RT_MM_PAGE_SIZE);
         RT_ASSERT(z->z_magic == ZALLOC_SLAB_MAGIC);
 
         zoneindex(&size);
@@ -771,7 +775,7 @@ void *rt_calloc(rt_size_t count, rt_size_t size)
 RTM_EXPORT(rt_calloc);
 
 /**
- * This function will release the previously allocated memory block by rt_malloc.
+ * This function will release the previous allocated memory block by rt_malloc.
  * The released memory block is taken back to system heap.
  *
  * @param ptr the address of memory which will be released
@@ -840,7 +844,8 @@ void rt_free(void *ptr)
     rt_sem_take(&heap_sem, RT_WAITING_FOREVER);
 
     /* zone case. get out zone. */
-	z = (slab_zone *)(((rt_uint32_t)ptr & ~RT_MM_PAGE_MASK) - kup->size * RT_MM_PAGE_SIZE);
+    z = (slab_zone *)(((rt_uint32_t)ptr & ~RT_MM_PAGE_MASK) -
+                      kup->size * RT_MM_PAGE_SIZE);
     RT_ASSERT(z->z_magic == ZALLOC_SLAB_MAGIC);
 
     chunk          = (slab_chunk *)ptr;
@@ -867,7 +872,8 @@ void rt_free(void *ptr)
      * this code can be called from an IPI callback, do *NOT* try to mess
      * with kernel_map here.  Hysteresis will be performed at malloc() time.
      */
-	if (z->z_nfree == z->z_nmax && (z->z_next || zone_array[z->z_zoneindex] != z))
+    if (z->z_nfree == z->z_nmax &&
+        (z->z_next || zone_array[z->z_zoneindex] != z))
     {
         slab_zone **pz;
 
@@ -920,7 +926,9 @@ void rt_free(void *ptr)
 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 = heap_end - heap_start;
@@ -934,6 +942,7 @@ void rt_memory_info(rt_uint32_t *total, rt_uint32_t *used, rt_uint32_t *max_used
 
 #ifdef RT_USING_FINSH
 #include <finsh.h>
+
 void list_mem(void)
 {
     rt_kprintf("total memory: %d\n", heap_end - heap_start);