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-rw-r--r--libc/stdlib/malloc-simple/alloc.c170
1 files changed, 83 insertions, 87 deletions
diff --git a/libc/stdlib/malloc-simple/alloc.c b/libc/stdlib/malloc-simple/alloc.c
index e017b6cbb..ed14c37c4 100644
--- a/libc/stdlib/malloc-simple/alloc.c
+++ b/libc/stdlib/malloc-simple/alloc.c
@@ -20,29 +20,29 @@
#ifdef L_malloc
void *malloc(size_t size)
{
- void *result;
+ void *result;
- if (unlikely(size == 0)) {
+ if (unlikely(size == 0)) {
#if defined(__MALLOC_GLIBC_COMPAT__)
- size++;
+ size++;
#else
- /* Some programs will call malloc (0). Lets be strict and return NULL */
- return 0;
+ /* Some programs will call malloc (0). Lets be strict and return NULL */
+ return 0;
#endif
- }
+ }
#ifdef __ARCH_HAS_MMU__
-#define MMAP_FLAGS MAP_PRIVATE | MAP_ANONYMOUS
+# define MMAP_FLAGS MAP_PRIVATE | MAP_ANONYMOUS
#else
-#define MMAP_FLAGS MAP_SHARED | MAP_ANONYMOUS
+# define MMAP_FLAGS MAP_SHARED | MAP_ANONYMOUS
#endif
- result = mmap((void *) 0, size + sizeof(size_t), PROT_READ | PROT_WRITE,
- MMAP_FLAGS, 0, 0);
- if (result == MAP_FAILED)
- return 0;
- * (size_t *) result = size;
- return(result + sizeof(size_t));
+ result = mmap((void *) 0, size + sizeof(size_t), PROT_READ | PROT_WRITE,
+ MMAP_FLAGS, 0, 0);
+ if (result == MAP_FAILED)
+ return 0;
+ * (size_t *) result = size;
+ return(result + sizeof(size_t));
}
#endif
@@ -74,23 +74,21 @@ void * calloc(size_t nmemb, size_t lsize)
#ifdef L_realloc
void *realloc(void *ptr, size_t size)
{
- void *newptr = NULL;
-
- if (!ptr)
- return malloc(size);
- if (!size) {
- free(ptr);
- return malloc(0);
- }
-
- newptr = malloc(size);
- if (newptr) {
- memcpy(newptr, ptr,
- *((size_t *) (ptr - sizeof(size_t)))
- );
- free(ptr);
- }
- return newptr;
+ void *newptr = NULL;
+
+ if (!ptr)
+ return malloc(size);
+ if (!size) {
+ free(ptr);
+ return malloc(0);
+ }
+
+ newptr = malloc(size);
+ if (newptr) {
+ memcpy(newptr, ptr, *((size_t *) (ptr - sizeof(size_t))));
+ free(ptr);
+ }
+ return newptr;
}
#endif
@@ -98,15 +96,14 @@ void *realloc(void *ptr, size_t size)
extern int weak_function __libc_free_aligned(void *ptr);
void free(void *ptr)
{
- if (ptr == NULL)
- return;
- if (unlikely(__libc_free_aligned!=NULL)) {
- if (__libc_free_aligned(ptr)) {
- return;
+ if (unlikely(ptr == NULL))
+ return;
+ if (unlikely(__libc_free_aligned != NULL)) {
+ if (__libc_free_aligned(ptr))
+ return;
}
- }
- ptr -= sizeof(size_t);
- munmap(ptr, * (size_t *) ptr + sizeof(size_t));
+ ptr -= sizeof(size_t);
+ munmap(ptr, * (size_t *) ptr + sizeof(size_t));
}
#endif
@@ -124,68 +121,67 @@ pthread_mutex_t __malloc_lock = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
/* List of blocks allocated with memalign or valloc */
struct alignlist
{
- struct alignlist *next;
- __ptr_t aligned; /* The address that memaligned returned. */
- __ptr_t exact; /* The address that malloc returned. */
+ struct alignlist *next;
+ __ptr_t aligned; /* The address that memaligned returned. */
+ __ptr_t exact; /* The address that malloc returned. */
};
struct alignlist *_aligned_blocks;
/* Return memory to the heap. */
int __libc_free_aligned(void *ptr)
{
- struct alignlist *l;
+ struct alignlist *l;
- if (ptr == NULL)
- return 0;
+ if (ptr == NULL)
+ return 0;
- LOCK;
- for (l = _aligned_blocks; l != NULL; l = l->next) {
- if (l->aligned == ptr) {
- /* Mark the block as free */
- l->aligned = NULL;
- ptr = l->exact;
- ptr -= sizeof(size_t);
- munmap(ptr, * (size_t *) ptr + sizeof(size_t));
- return 1;
+ LOCK;
+ for (l = _aligned_blocks; l != NULL; l = l->next) {
+ if (l->aligned == ptr) {
+ /* Mark the block as free */
+ l->aligned = NULL;
+ ptr = l->exact;
+ ptr -= sizeof(size_t);
+ munmap(ptr, * (size_t *) ptr + sizeof(size_t));
+ return 1;
+ }
}
- }
- UNLOCK;
- return 0;
+ UNLOCK;
+ return 0;
}
void * memalign (size_t alignment, size_t size)
{
- void * result;
- unsigned long int adj;
-
- result = malloc (size + alignment - 1);
- if (result == NULL)
- return NULL;
- adj = (unsigned long int) ((unsigned long int) ((char *) result -
- (char *) NULL)) % alignment;
- if (adj != 0)
- {
- struct alignlist *l;
- LOCK;
- for (l = _aligned_blocks; l != NULL; l = l->next)
- if (l->aligned == NULL)
- /* This slot is free. Use it. */
- break;
- if (l == NULL)
- {
- l = (struct alignlist *) malloc (sizeof (struct alignlist));
- if (l == NULL) {
- free(result);
- UNLOCK;
+ void * result;
+ unsigned long int adj;
+
+ result = malloc (size + alignment - 1);
+ if (result == NULL)
return NULL;
- }
- l->next = _aligned_blocks;
- _aligned_blocks = l;
+
+ adj = (unsigned long int) ((unsigned long int) ((char *) result -
+ (char *) NULL)) % alignment;
+ if (adj != 0) {
+ struct alignlist *l;
+ LOCK;
+ for (l = _aligned_blocks; l != NULL; l = l->next)
+ if (l->aligned == NULL)
+ /* This slot is free. Use it. */
+ break;
+ if (l == NULL) {
+ l = (struct alignlist *) malloc (sizeof (struct alignlist));
+ if (l == NULL) {
+ free(result);
+ UNLOCK;
+ return NULL;
+ }
+ l->next = _aligned_blocks;
+ _aligned_blocks = l;
+ }
+ l->exact = result;
+ result = l->aligned = (char *) result + alignment - adj;
+ UNLOCK;
}
- l->exact = result;
- result = l->aligned = (char *) result + alignment - adj;
- UNLOCK;
- }
- return result;
+ return result;
}
#endif