diff options
Diffstat (limited to 'Modules/_ctypes/libffi/src/dlmalloc.c')
| -rw-r--r-- | Modules/_ctypes/libffi/src/dlmalloc.c | 70 |
1 files changed, 66 insertions, 4 deletions
diff --git a/Modules/_ctypes/libffi/src/dlmalloc.c b/Modules/_ctypes/libffi/src/dlmalloc.c index 582ddc3..2773953 100644 --- a/Modules/_ctypes/libffi/src/dlmalloc.c +++ b/Modules/_ctypes/libffi/src/dlmalloc.c @@ -464,6 +464,14 @@ DEFAULT_MMAP_THRESHOLD default: 256K #define _GNU_SOURCE 1 #endif /* WIN32 */ +#ifdef __OS2__ +#define INCL_DOS +#include <os2.h> +#define HAVE_MMAP 1 +#define HAVE_MORECORE 0 +#define LACKS_SYS_MMAN_H +#endif /* __OS2__ */ + #if defined(DARWIN) || defined(_DARWIN) /* Mac OSX docs advise not to use sbrk; it seems better to use mmap */ #ifndef HAVE_MORECORE @@ -619,6 +627,9 @@ DEFAULT_MMAP_THRESHOLD default: 256K #include "/usr/include/malloc.h" #else /* HAVE_USR_INCLUDE_MALLOC_H */ +/* HP-UX's stdlib.h redefines mallinfo unless _STRUCT_MALLINFO is defined */ +#define _STRUCT_MALLINFO + struct mallinfo { MALLINFO_FIELD_TYPE arena; /* non-mmapped space allocated from system */ MALLINFO_FIELD_TYPE ordblks; /* number of free chunks */ @@ -1293,7 +1304,7 @@ extern void* sbrk(ptrdiff_t); #define IS_MMAPPED_BIT (SIZE_T_ONE) #define USE_MMAP_BIT (SIZE_T_ONE) -#ifndef WIN32 +#if !defined(WIN32) && !defined (__OS2__) #define CALL_MUNMAP(a, s) munmap((a), (s)) #define MMAP_PROT (PROT_READ|PROT_WRITE) #if !defined(MAP_ANONYMOUS) && defined(MAP_ANON) @@ -1316,6 +1327,42 @@ static int dev_zero_fd = -1; /* Cached file descriptor for /dev/zero. */ #endif /* MAP_ANONYMOUS */ #define DIRECT_MMAP(s) CALL_MMAP(s) + +#elif defined(__OS2__) + +/* OS/2 MMAP via DosAllocMem */ +static void* os2mmap(size_t size) { + void* ptr; + if (DosAllocMem(&ptr, size, OBJ_ANY|PAG_COMMIT|PAG_READ|PAG_WRITE) && + DosAllocMem(&ptr, size, PAG_COMMIT|PAG_READ|PAG_WRITE)) + return MFAIL; + return ptr; +} + +#define os2direct_mmap(n) os2mmap(n) + +/* This function supports releasing coalesed segments */ +static int os2munmap(void* ptr, size_t size) { + while (size) { + ULONG ulSize = size; + ULONG ulFlags = 0; + if (DosQueryMem(ptr, &ulSize, &ulFlags) != 0) + return -1; + if ((ulFlags & PAG_BASE) == 0 ||(ulFlags & PAG_COMMIT) == 0 || + ulSize > size) + return -1; + if (DosFreeMem(ptr) != 0) + return -1; + ptr = ( void * ) ( ( char * ) ptr + ulSize ); + size -= ulSize; + } + return 0; +} + +#define CALL_MMAP(s) os2mmap(s) +#define CALL_MUNMAP(a, s) os2munmap((a), (s)) +#define DIRECT_MMAP(s) os2direct_mmap(s) + #else /* WIN32 */ /* Win32 MMAP via VirtualAlloc */ @@ -1392,7 +1439,7 @@ static int win32munmap(void* ptr, size_t size) { unique mparams values are initialized only once. */ -#ifndef WIN32 +#if !defined(WIN32) && !defined(__OS2__) /* By default use posix locks */ #include <pthread.h> #define MLOCK_T pthread_mutex_t @@ -1406,6 +1453,16 @@ static MLOCK_T morecore_mutex = PTHREAD_MUTEX_INITIALIZER; static MLOCK_T magic_init_mutex = PTHREAD_MUTEX_INITIALIZER; +#elif defined(__OS2__) +#define MLOCK_T HMTX +#define INITIAL_LOCK(l) DosCreateMutexSem(0, l, 0, FALSE) +#define ACQUIRE_LOCK(l) DosRequestMutexSem(*l, SEM_INDEFINITE_WAIT) +#define RELEASE_LOCK(l) DosReleaseMutexSem(*l) +#if HAVE_MORECORE +static MLOCK_T morecore_mutex; +#endif /* HAVE_MORECORE */ +static MLOCK_T magic_init_mutex; + #else /* WIN32 */ /* Because lock-protected regions have bounded times, and there @@ -2497,10 +2554,15 @@ static int init_mparams(void) { } RELEASE_MAGIC_INIT_LOCK(); -#ifndef WIN32 +#if !defined(WIN32) && !defined(__OS2__) mparams.page_size = malloc_getpagesize; mparams.granularity = ((DEFAULT_GRANULARITY != 0)? DEFAULT_GRANULARITY : mparams.page_size); +#elif defined (__OS2__) + /* if low-memory is used, os2munmap() would break + if it were anything other than 64k */ + mparams.page_size = 4096u; + mparams.granularity = 65536u; #else /* WIN32 */ { SYSTEM_INFO system_info; @@ -4197,7 +4259,7 @@ void* dlmalloc(size_t bytes) { void dlfree(void* mem) { /* - Consolidate freed chunks with preceeding or succeeding bordering + Consolidate freed chunks with preceding or succeeding bordering free chunks, if they exist, and then place in a bin. Intermixed with special cases for top, dv, mmapped chunks, and usage errors. */ |