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