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Implement win32 thread-safety stuff 

Patch from Bradley Grainger.
This commit is contained in:
Behdad Esfahbod 2011-05-03 00:09:16 -04:00
parent f55272ecde
commit fc52e9e44c
2 changed files with 79 additions and 5 deletions
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54
src/hb-common.cc
View File

@ -263,4 +263,58 @@ hb_script_get_horizontal_direction (hb_script_t script)
}
/* System stuff */
#ifdef _MSC_VER
#include <Windows.h>
hb_mutex_t
_hb_win32_mutex_create ()
{
hb_mutex_t m;
_hb_win32_mutex_init (&m);
return m;
}
void
_hb_win32_mutex_init (hb_mutex_t *m)
{
LPCRITICAL_SECTION lpcs = (LPCRITICAL_SECTION) calloc(1, sizeof(CRITICAL_SECTION));
InitializeCriticalSection (lpcs);
*m = (void*) lpcs;
}
void
_hb_win32_mutex_lock (hb_mutex_t m)
{
EnterCriticalSection ((LPCRITICAL_SECTION) m);
}
int
_hb_win32_mutex_trylock (hb_mutex_t m)
{
return TryEnterCriticalSection ((LPCRITICAL_SECTION) m);
}
void
_hb_win32_mutex_unlock (hb_mutex_t m)
{
LeaveCriticalSection ((LPCRITICAL_SECTION) m);
}
void
_hb_win32_mutex_free (hb_mutex_t *m)
{
LPCRITICAL_SECTION lpcs = (LPCRITICAL_SECTION) *m;
DeleteCriticalSection (lpcs);
free(lpcs);
*m = 0;
}
#endif
HB_END_DECLS

30
src/hb-private.hh
View File

@ -243,13 +243,31 @@ typedef GStaticMutex hb_mutex_t;
#else
#ifdef _MSC_VER
#define _HB__STR2__(x) #x
#define _HB__STR1__(x) _HB__STR2__(x)
#define _HB__LOC__ __FILE__ "("_HB__STR1__(__LINE__)") : Warning Msg: "
#pragma message(_HB__LOC__"Could not find any system to define platform macros, library will NOT be thread-safe")
#include <intrin.h>
typedef long hb_atomic_int_t;
#define hb_atomic_int_fetch_and_add(AI, V) _InterlockedExchangeAdd (&(AI), V)
#define hb_atomic_int_get(AI) (_ReadBarrier (), (AI))
#define hb_atomic_int_set(AI, V) ((void) _InterlockedExchange (&(AI), (V)))
typedef void * hb_mutex_t;
extern HB_INTERNAL hb_mutex_t _hb_win32_mutex_create (void);
extern HB_INTERNAL void _hb_win32_mutex_init (hb_mutex_t *m);
extern HB_INTERNAL void _hb_win32_mutex_lock (hb_mutex_t m);
extern HB_INTERNAL int _hb_win32_mutex_trylock (hb_mutex_t m);
extern HB_INTERNAL void _hb_win32_mutex_unlock (hb_mutex_t m);
extern HB_INTERNAL void _hb_win32_mutex_free (hb_mutex_t *m);
#define HB_MUTEX_INIT _hb_win32_mutex_create ()
#define hb_mutex_init(M) _hb_win32_mutex_init (&(M))
#define hb_mutex_lock(M) _hb_win32_mutex_lock ((M))
#define hb_mutex_trylock(M) _hb_win32_mutex_trylock ((M))
#define hb_mutex_unlock(M) _hb_win32_mutex_unlock ((M))
#define hb_mutex_free(M) _hb_win32_mutex_free (&(M))
#else
#warning "Could not find any system to define platform macros, library will NOT be thread-safe"
#endif
typedef volatile int hb_atomic_int_t;
#define hb_atomic_int_fetch_and_add(AI, V) ((AI) += (V), (AI) - (V))
@ -266,6 +284,8 @@ typedef volatile int hb_mutex_t;
#endif
#endif
HB_END_DECLS