diff options
Diffstat (limited to 'libc')
| -rw-r--r-- | libc/stdlib/Makefile | 12 | ||||
| -rw-r--r-- | libc/stdlib/malloc-930716/Makefile | 1 | ||||
| -rw-r--r-- | libc/stdlib/malloc-930716/malloc.c | 62 | ||||
| -rw-r--r-- | libc/stdlib/valloc.c | 33 |
4 files changed, 69 insertions, 39 deletions
diff --git a/libc/stdlib/Makefile b/libc/stdlib/Makefile index 14ac93f51..4faf85010 100644 --- a/libc/stdlib/Makefile +++ b/libc/stdlib/Makefile @@ -40,14 +40,12 @@ endif MSRC2=atexit.c MOBJ2=atexit.o on_exit.o __exit_handler.o exit.o - CSRC = abort.c getenv.c mkdtemp.c mktemp.c realpath.c mkstemp.c mkstemp64.c \ - rand.c random.c random_r.c setenv.c system.c div.c ldiv.c \ - getpt.c ptsname.c grantpt.c unlockpt.c gcvt.c drand48.c \ - drand48-iter.c drand48_r.c erand48.c erand48_r.c jrand48.c \ - jrand48_r.c lrand48.c lrand48_r.c mrand48.c mrand48_r.c \ - nrand48.c nrand48_r.c rand_r.c srand48.c srand48_r.c calloc.c \ - valloc.c + rand.c random.c random_r.c setenv.c system.c div.c ldiv.c getpt.c \ + ptsname.c grantpt.c unlockpt.c gcvt.c drand48.c drand48-iter.c \ + drand48_r.c erand48.c erand48_r.c jrand48.c jrand48_r.c lrand48.c \ + lrand48_r.c mrand48.c mrand48_r.c nrand48.c nrand48_r.c rand_r.c \ + srand48.c srand48_r.c calloc.c valloc.c ifeq ($(HAS_FLOATING_POINT),true) CSRC += strtod.c strtof.c strtold.c endif diff --git a/libc/stdlib/malloc-930716/Makefile b/libc/stdlib/malloc-930716/Makefile index cc746707e..9b4b90fb1 100644 --- a/libc/stdlib/malloc-930716/Makefile +++ b/libc/stdlib/malloc-930716/Makefile @@ -25,6 +25,7 @@ TOPDIR=../../../ include $(TOPDIR)Rules.mak # calloc.c can be found at uClibc/libc/stdlib/calloc.c +# valloc.c can be found at uClibc/libc/stdlib/valloc.c CSRC=malloc.c COBJS=$(patsubst %.c,%.o, $(CSRC)) OBJS=$(COBJS) diff --git a/libc/stdlib/malloc-930716/malloc.c b/libc/stdlib/malloc-930716/malloc.c index e97146184..545f0e347 100644 --- a/libc/stdlib/malloc-930716/malloc.c +++ b/libc/stdlib/malloc-930716/malloc.c @@ -64,6 +64,14 @@ static struct list _fraghead[BLOCKLOG]; /* Are we experienced? */ static int initialized; +/* 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. */ +}; +static struct alignlist *_aligned_blocks; /* Aligned allocation. @@ -301,12 +309,24 @@ static void * malloc_unlocked (size_t size) return result; } - - /* Return memory to the heap. */ void free(void *ptr) { + struct alignlist *l; + + if (ptr == NULL) + return; + 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; + break; + } + } + free_unlocked(ptr); UNLOCK; } @@ -319,6 +339,7 @@ static void free_unlocked(void *ptr) if (ptr == NULL) return; + block = BLOCK(ptr); switch (type = _heapinfo[block].busy.type) { @@ -539,3 +560,40 @@ void * realloc (void *ptr, size_t size) UNLOCK; } +__ptr_t memalign (size_t alignment, size_t size) +{ + __ptr_t 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_unlocked (result); + UNLOCK; + return NULL; + } + l->next = _aligned_blocks; + _aligned_blocks = l; + } + l->exact = result; + result = l->aligned = (char *) result + alignment - adj; + UNLOCK; + } + + return result; +} + diff --git a/libc/stdlib/valloc.c b/libc/stdlib/valloc.c index bfb9efd2a..dceeaf857 100644 --- a/libc/stdlib/valloc.c +++ b/libc/stdlib/valloc.c @@ -21,41 +21,14 @@ Cambridge, MA 02139, USA. or (US mail) as Mike Haertel c/o Free Software Foundation. */ #include <stdlib.h> -#include "malloc.h" - -#ifdef emacs -#include "config.h" -#endif - -#ifdef __GNU_LIBRARY__ -extern size_t __getpagesize __P ((void)); -#else -#ifndef USG -extern size_t getpagesize __P ((void)); -#define __getpagesize() getpagesize() -#else -#include <sys/param.h> -#ifdef EXEC_PAGESIZE -#define __getpagesize() EXEC_PAGESIZE -#else /* No EXEC_PAGESIZE. */ -#ifdef NBPG -#ifndef CLSIZE -#define CLSIZE 1 -#endif /* No CLSIZE. */ -#define __getpagesize() (NBPG * CLSIZE) -#else /* No NBPG. */ -#define __getpagesize() NBPC -#endif /* NBPG. */ -#endif /* EXEC_PAGESIZE. */ -#endif /* USG. */ -#endif +#include <unistd.h> static size_t pagesize; __ptr_t valloc (size_t size) { if (pagesize == 0) - pagesize = __getpagesize (); + pagesize = getpagesize (); - return memalign (pagesize, size); + return memalign(pagesize, size); } |