intercept.h

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#ifndef __CWIST_CORE_MEM_INTERCEPT_H__
#define __CWIST_CORE_MEM_INTERCEPT_H__
 
#include <stddef.h>
/* Must pull in <stdlib.h> here, before the malloc/calloc/realloc/free
 * macros below take effect: if a later #include <stdlib.h> (by this
 * translation unit or transitively by another header) were the first one
 * processed, its own `void *calloc(size_t, size_t);`-style declarations
 * would get rewritten by our function-like macros mid-declaration - not a
 * hypothetical, this reliably fails to compile. Getting stdlib.h's
 * include guard to trip on any later inclusion (a no-op once already
 * included) avoids that class of corruption entirely. */
#include <stdlib.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
void *cwist_malloc_shim(size_t size);
 
void *cwist_calloc_shim(size_t nmemb, size_t size);
 
void *cwist_realloc_shim(void *ptr, size_t size);
 
void cwist_free_shim(void *ptr);
 
#ifdef __cplusplus
}
#endif
 
#if defined(CWIST_INTERCEPT_MALLOC)
#define malloc(sz) cwist_malloc_shim(sz)
#define calloc(n, sz) cwist_calloc_shim((n), (sz))
#define realloc(p, sz) cwist_realloc_shim((p), (sz))
#define free(p) cwist_free_shim(p)
#endif
 
#endif