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#ifdef __cplusplus
extern "C" {
#endif
#ifndef GDHELPERS_H
#define GDHELPERS_H 1
/* sys/types.h is needed for size_t on Sparc-SunOS-4.1 */
#ifndef _WIN32_WCE
#include <sys/types.h>
#else
#include <stdlib.h>
#endif /* _WIN32_WCE */
/* TBB: strtok_r is not universal; provide an implementation of it. */
char * gd_strtok_r (char *s, char *sep, char **state);
/* These functions wrap memory management. gdFree is
in gd.h, where callers can utilize it to correctly
free memory allocated by these functions with the
right version of free(). */
void *gdCalloc (size_t nmemb, size_t size);
void *gdMalloc (size_t size);
void *gdRealloc (void *ptr, size_t size);
/* The extended version of gdReallocEx will free *ptr if the
* realloc fails */
void *gdReallocEx (void *ptr, size_t size);
/* Returns nonzero if multiplying the two quantities will
result in integer overflow. Also returns nonzero if
either quantity is negative. By Phil Knirsch based on
netpbm fixes by Alan Cox. */
int overflow2(int a, int b);
/* 2.0.16: portable mutex support for thread safety. */
#if defined(CPP_SHARP)
# define gdMutexDeclare(x)
# define gdMutexSetup(x)
# define gdMutexShutdown(x)
# define gdMutexLock(x)
# define gdMutexUnlock(x)
#elif defined(_WIN32)
/* 2.0.18: must include windows.h to get CRITICAL_SECTION. */
# include <windows.h>
# define gdMutexDeclare(x) CRITICAL_SECTION x
# define gdMutexSetup(x) InitializeCriticalSection(&x)
# define gdMutexShutdown(x) DeleteCriticalSection(&x)
# define gdMutexLock(x) EnterCriticalSection(&x)
# define gdMutexUnlock(x) LeaveCriticalSection(&x)
#elif defined(HAVE_PTHREAD)
# include <pthread.h>
# define gdMutexDeclare(x) pthread_mutex_t x
# define gdMutexSetup(x) pthread_mutex_init(&x, 0)
# define gdMutexShutdown(x) pthread_mutex_destroy(&x)
# define gdMutexLock(x) pthread_mutex_lock(&x)
# define gdMutexUnlock(x) pthread_mutex_unlock(&x)
#else
# define gdMutexDeclare(x)
# define gdMutexSetup(x)
# define gdMutexShutdown(x)
# define gdMutexLock(x)
# define gdMutexUnlock(x)
#endif /* _WIN32 || HAVE_PTHREAD */
#define DPCM2DPI(dpcm) (unsigned int)((dpcm)*2.54 + 0.5)
#define DPM2DPI(dpm) (unsigned int)((dpm)*0.0254 + 0.5)
#define DPI2DPCM(dpi) (unsigned int)((dpi)/2.54 + 0.5)
#define DPI2DPM(dpi) (unsigned int)((dpi)/0.0254 + 0.5)
#endif /* GDHELPERS_H */
#ifdef __cplusplus
}
#endif
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