diff options
Diffstat (limited to 'src/stdlib/realloc.c')
| -rw-r--r-- | src/stdlib/realloc.c | 30 |
1 files changed, 16 insertions, 14 deletions
diff --git a/src/stdlib/realloc.c b/src/stdlib/realloc.c index 9b4d28ee..c1008457 100644 --- a/src/stdlib/realloc.c +++ b/src/stdlib/realloc.c @@ -1,19 +1,18 @@ -#include <stdlib.h> +#if ((!defined _POSIX_C_SOURCE) || (_POSIX_C_SOURCE < 199309L)) +#undef _POSIX_C_SOURCE +#define _POSIX_C_SOURCE 199309L +#define POSIX_FORCED +#endif -#if defined _POSIX_C_SOURCE && 199305L <= _POSIX_C_SOURCE -#include "sys/types.h" -#include "fcntl.h" -#include "sys/mman.h" +#include <stdlib.h> +#include <sys/types.h> +#include <fcntl.h> +#include <sys/mman.h> -#else +#ifdef POSIX_FORCED #include "_syscall.h" -#define PROT_READ 0x1 -#define PROT_WRITE 0x2 -#define MAP_PRIVATE 0x2 -#define O_RDWR 0x2 -#define mmap(_a, _l, _p, _fl, _fd, _o) __syscall(__syscall_lookup(mmap), _a, _l, _p, _fl, _fd, _o) -#define open(_p, _a, _m) __syscall(__syscall_lookup(open), _p, _a, _m) - +#define mmap(_a, _l, _p, _fl, _fd, _o) __scall6(mmap, _a, _l, _p, _fl, _fd, _o) +#define open(_p, _a, _m) __scall3(open, _p, _a, _m) #endif /** change the amount of memory allocated **/ @@ -29,8 +28,11 @@ void * realloc(void * ptr, size_t size) if (ptr == NULL) { /* malloc() */ - return (void*)(long)mmap(NULL, size, PROT_READ | PROT_WRITE, + ptr = (void*)(long)mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE, backing, 0); + if (ptr == MAP_FAILED) { + return NULL; + } } else if (size == 0) { /* free() */ } |