#if (defined SLJIT_EXECUTABLE_ALLOCATOR && SLJIT_EXECUTABLE_ALLOCATOR) || (defined SLJIT_UTIL_GLOBAL_LOCK && SLJIT_UTIL_GLOBAL_LOCK)
#if (defined SLJIT_SINGLE_THREADED && SLJIT_SINGLE_THREADED)
#if (defined SLJIT_EXECUTABLE_ALLOCATOR && SLJIT_EXECUTABLE_ALLOCATOR)
static SLJIT_INLINE void allocator_grab_lock(void)
{
}
static SLJIT_INLINE void allocator_release_lock(void)
{
}
#endif
#if (defined SLJIT_UTIL_GLOBAL_LOCK && SLJIT_UTIL_GLOBAL_LOCK)
SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_grab_lock(void)
{
}
SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_release_lock(void)
{
}
#endif
#elif defined(_WIN32)
#include "windows.h"
#if (defined SLJIT_EXECUTABLE_ALLOCATOR && SLJIT_EXECUTABLE_ALLOCATOR)
static HANDLE allocator_mutex = 0;
static SLJIT_INLINE void allocator_grab_lock(void)
{
if (!allocator_mutex)
allocator_mutex = CreateMutex(NULL, TRUE, NULL);
else
WaitForSingleObject(allocator_mutex, INFINITE);
}
static SLJIT_INLINE void allocator_release_lock(void)
{
ReleaseMutex(allocator_mutex);
}
#endif
#if (defined SLJIT_UTIL_GLOBAL_LOCK && SLJIT_UTIL_GLOBAL_LOCK)
static HANDLE global_mutex = 0;
SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_grab_lock(void)
{
if (!global_mutex)
global_mutex = CreateMutex(NULL, TRUE, NULL);
else
WaitForSingleObject(global_mutex, INFINITE);
}
SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_release_lock(void)
{
ReleaseMutex(global_mutex);
}
#endif
#else
#if (defined SLJIT_EXECUTABLE_ALLOCATOR && SLJIT_EXECUTABLE_ALLOCATOR)
#include <pthread.h>
static pthread_mutex_t allocator_mutex = PTHREAD_MUTEX_INITIALIZER;
static SLJIT_INLINE void allocator_grab_lock(void)
{
pthread_mutex_lock(&allocator_mutex);
}
static SLJIT_INLINE void allocator_release_lock(void)
{
pthread_mutex_unlock(&allocator_mutex);
}
#endif
#if (defined SLJIT_UTIL_GLOBAL_LOCK && SLJIT_UTIL_GLOBAL_LOCK)
#include <pthread.h>
static pthread_mutex_t global_mutex = PTHREAD_MUTEX_INITIALIZER;
SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_grab_lock(void)
{
pthread_mutex_lock(&global_mutex);
}
SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_release_lock(void)
{
pthread_mutex_unlock(&global_mutex);
}
#endif
#endif
#if (defined SLJIT_UTIL_STACK && SLJIT_UTIL_STACK) || (defined SLJIT_EXECUTABLE_ALLOCATOR && SLJIT_EXECUTABLE_ALLOCATOR)
#ifdef _WIN32
#include "windows.h"
#else
#include <sys/mman.h>
#include <unistd.h>
#ifndef MAP_ANON
#include <fcntl.h>
static sljit_si dev_zero = -1;
#if (defined SLJIT_SINGLE_THREADED && SLJIT_SINGLE_THREADED)
static SLJIT_INLINE sljit_si open_dev_zero(void)
{
dev_zero = open("/dev/zero", O_RDWR);
return dev_zero < 0;
}
#else
#include <pthread.h>
static pthread_mutex_t dev_zero_mutex = PTHREAD_MUTEX_INITIALIZER;
static SLJIT_INLINE sljit_si open_dev_zero(void)
{
pthread_mutex_lock(&dev_zero_mutex);
dev_zero = open("/dev/zero", O_RDWR);
pthread_mutex_unlock(&dev_zero_mutex);
return dev_zero < 0;
}
#endif
#endif
#endif
#endif
#if (defined SLJIT_UTIL_STACK && SLJIT_UTIL_STACK)
static sljit_sw sljit_page_align = 0;
SLJIT_API_FUNC_ATTRIBUTE struct sljit_stack* SLJIT_CALL sljit_allocate_stack(sljit_uw limit, sljit_uw max_limit, void *allocator_data)
{
struct sljit_stack *stack;
union {
void *ptr;
sljit_uw uw;
} base;
#ifdef _WIN32
SYSTEM_INFO si;
#endif
SLJIT_UNUSED_ARG(allocator_data);
if (limit > max_limit || limit < 1)
return NULL;
#ifdef _WIN32
if (!sljit_page_align) {
GetSystemInfo(&si);
sljit_page_align = si.dwPageSize - 1;
}
#else
if (!sljit_page_align) {
sljit_page_align = sysconf(_SC_PAGESIZE);
if (sljit_page_align < 0)
sljit_page_align = 4096;
sljit_page_align--;
}
#endif
max_limit = (max_limit + sljit_page_align) & ~sljit_page_align;
stack = (struct sljit_stack*)SLJIT_MALLOC(sizeof(struct sljit_stack), allocator_data);
if (!stack)
return NULL;
#ifdef _WIN32
base.ptr = VirtualAlloc(NULL, max_limit, MEM_RESERVE, PAGE_READWRITE);
if (!base.ptr) {
SLJIT_FREE(stack, allocator_data);
return NULL;
}
stack->base = base.uw;
stack->limit = stack->base;
stack->max_limit = stack->base + max_limit;
if (sljit_stack_resize(stack, stack->base + limit)) {
sljit_free_stack(stack, allocator_data);
return NULL;
}
#else
#ifdef MAP_ANON
base.ptr = mmap(NULL, max_limit, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0);
#else
if (dev_zero < 0) {
if (open_dev_zero()) {
SLJIT_FREE(stack, allocator_data);
return NULL;
}
}
base.ptr = mmap(NULL, max_limit, PROT_READ | PROT_WRITE, MAP_PRIVATE, dev_zero, 0);
#endif
if (base.ptr == MAP_FAILED) {
SLJIT_FREE(stack, allocator_data);
return NULL;
}
stack->base = base.uw;
stack->limit = stack->base + limit;
stack->max_limit = stack->base + max_limit;
#endif
stack->top = stack->base;
return stack;
}
#undef PAGE_ALIGN
SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_free_stack(struct sljit_stack* stack, void *allocator_data)
{
SLJIT_UNUSED_ARG(allocator_data);
#ifdef _WIN32
VirtualFree((void*)stack->base, 0, MEM_RELEASE);
#else
munmap((void*)stack->base, stack->max_limit - stack->base);
#endif
SLJIT_FREE(stack, allocator_data);
}
SLJIT_API_FUNC_ATTRIBUTE sljit_sw SLJIT_CALL sljit_stack_resize(struct sljit_stack* stack, sljit_uw new_limit)
{
sljit_uw aligned_old_limit;
sljit_uw aligned_new_limit;
if ((new_limit > stack->max_limit) || (new_limit < stack->base))
return -1;
#ifdef _WIN32
aligned_new_limit = (new_limit + sljit_page_align) & ~sljit_page_align;
aligned_old_limit = (stack->limit + sljit_page_align) & ~sljit_page_align;
if (aligned_new_limit != aligned_old_limit) {
if (aligned_new_limit > aligned_old_limit) {
if (!VirtualAlloc((void*)aligned_old_limit, aligned_new_limit - aligned_old_limit, MEM_COMMIT, PAGE_READWRITE))
return -1;
}
else {
if (!VirtualFree((void*)aligned_new_limit, aligned_old_limit - aligned_new_limit, MEM_DECOMMIT))
return -1;
}
}
stack->limit = new_limit;
return 0;
#else
if (new_limit >= stack->limit) {
stack->limit = new_limit;
return 0;
}
aligned_new_limit = (new_limit + sljit_page_align) & ~sljit_page_align;
aligned_old_limit = (stack->limit + sljit_page_align) & ~sljit_page_align;
#if defined(MADV_DONTNEED)
if (aligned_new_limit < aligned_old_limit)
madvise((void*)aligned_new_limit, aligned_old_limit - aligned_new_limit, MADV_DONTNEED);
#elif defined(POSIX_MADV_DONTNEED)
if (aligned_new_limit < aligned_old_limit)
posix_madvise((void*)aligned_new_limit, aligned_old_limit - aligned_new_limit, POSIX_MADV_DONTNEED);
#endif
stack->limit = new_limit;
return 0;
#endif
}
#endif
#endif