diff options
Diffstat (limited to 'src/3rdparty/pcre/sljit/sljitUtils.c')
| -rw-r--r-- | src/3rdparty/pcre/sljit/sljitUtils.c | 104 |
1 files changed, 94 insertions, 10 deletions
diff --git a/src/3rdparty/pcre/sljit/sljitUtils.c b/src/3rdparty/pcre/sljit/sljitUtils.c index f3b52fece7..1f023fa644 100644 --- a/src/3rdparty/pcre/sljit/sljitUtils.c +++ b/src/3rdparty/pcre/sljit/sljitUtils.c @@ -30,7 +30,37 @@ #if (defined SLJIT_EXECUTABLE_ALLOCATOR && SLJIT_EXECUTABLE_ALLOCATOR) || (defined SLJIT_UTIL_GLOBAL_LOCK && SLJIT_UTIL_GLOBAL_LOCK) -#ifdef _WIN32 +#if (defined SLJIT_SINGLE_THREADED && SLJIT_SINGLE_THREADED) + +#if (defined SLJIT_EXECUTABLE_ALLOCATOR && SLJIT_EXECUTABLE_ALLOCATOR) + +static SLJIT_INLINE void allocator_grab_lock(void) +{ + /* Always successful. */ +} + +static SLJIT_INLINE void allocator_release_lock(void) +{ + /* Always successful. */ +} + +#endif /* SLJIT_EXECUTABLE_ALLOCATOR */ + +#if (defined SLJIT_UTIL_GLOBAL_LOCK && SLJIT_UTIL_GLOBAL_LOCK) + +SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_grab_lock(void) +{ + /* Always successful. */ +} + +SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_release_lock(void) +{ + /* Always successful. */ +} + +#endif /* SLJIT_UTIL_GLOBAL_LOCK */ + +#elif defined(_WIN32) /* SLJIT_SINGLE_THREADED */ #include "windows.h" @@ -76,10 +106,10 @@ SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_release_lock(void) #else /* _WIN32 */ -#include "pthread.h" - #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) @@ -96,6 +126,8 @@ static SLJIT_INLINE void allocator_release_lock(void) #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) @@ -116,17 +148,57 @@ SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_release_lock(void) /* Stack */ /* ------------------------------------------------------------------------ */ -#if (defined SLJIT_UTIL_STACK && SLJIT_UTIL_STACK) +#if (defined SLJIT_UTIL_STACK && SLJIT_UTIL_STACK) || (defined SLJIT_EXECUTABLE_ALLOCATOR && SLJIT_EXECUTABLE_ALLOCATOR) #ifdef _WIN32 #include "windows.h" #else +/* Provides mmap function. */ #include <sys/mman.h> +/* For detecting the page size. */ #include <unistd.h> + +#ifndef MAP_ANON + +#include <fcntl.h> + +/* Some old systems does not have MAP_ANON. */ +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 /* SLJIT_SINGLE_THREADED */ + +#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 /* SLJIT_SINGLE_THREADED */ + #endif +#endif + +#endif /* SLJIT_UTIL_STACK || SLJIT_EXECUTABLE_ALLOCATOR */ + +#if (defined SLJIT_UTIL_STACK && SLJIT_UTIL_STACK) + /* Planning to make it even more clever in the future. */ -static sljit_w sljit_page_align = 0; +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) { @@ -165,7 +237,7 @@ SLJIT_API_FUNC_ATTRIBUTE struct sljit_stack* SLJIT_CALL sljit_allocate_stack(slj return NULL; #ifdef _WIN32 - base.ptr = VirtualAlloc(0, max_limit, MEM_RESERVE, PAGE_READWRITE); + base.ptr = VirtualAlloc(NULL, max_limit, MEM_RESERVE, PAGE_READWRITE); if (!base.ptr) { SLJIT_FREE(stack); return NULL; @@ -178,7 +250,17 @@ SLJIT_API_FUNC_ATTRIBUTE struct sljit_stack* SLJIT_CALL sljit_allocate_stack(slj return NULL; } #else - base.ptr = mmap(0, max_limit, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0); +#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); + 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); return NULL; @@ -203,7 +285,7 @@ SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_free_stack(struct sljit_stack* st SLJIT_FREE(stack); } -SLJIT_API_FUNC_ATTRIBUTE sljit_w SLJIT_CALL sljit_stack_resize(struct sljit_stack* stack, sljit_uw new_limit) +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; @@ -232,10 +314,12 @@ SLJIT_API_FUNC_ATTRIBUTE sljit_w SLJIT_CALL sljit_stack_resize(struct sljit_stac } aligned_new_limit = (new_limit + sljit_page_align) & ~sljit_page_align; aligned_old_limit = (stack->limit + sljit_page_align) & ~sljit_page_align; + /* If madvise is available, we release the unnecessary space. */ +#if defined(POSIX_MADV_DONTNEED) if (aligned_new_limit < aligned_old_limit) -#if defined(__QNXNTO__) || defined(__LSB_VERSION__) posix_madvise((void*)aligned_new_limit, aligned_old_limit - aligned_new_limit, POSIX_MADV_DONTNEED); -#else +#elif defined(MADV_DONTNEED) + if (aligned_new_limit < aligned_old_limit) madvise((void*)aligned_new_limit, aligned_old_limit - aligned_new_limit, MADV_DONTNEED); #endif stack->limit = new_limit; |