Created
July 18, 2014 23:30
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Return value error-checking macro generator
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/** | |
* Handy meta-macro to simplify repetitive error checking for APIs where every function returns | |
* an error code (e.g. CUDA, C11 threads, most of the Windows API, etc.) | |
* | |
* Example usage: | |
* #define CUDA_CHECK(expr) RETVAL_CHECK(cudaSuccess, expr) | |
* ... | |
* CUDA_CHECK( cudaMemcpy(dst, src, size, cudaMemcpyHostToDevice) ); | |
* | |
* To disable the checks in release builds, just redefine the macro: | |
* #define CUDA_CHECK(expr) expr | |
* | |
* As written, it's Visual C++ specific, but don't let that stop you! | |
*/ | |
#define RETVAL_CHECK(expected, expr) do { \ | |
int err = (expr); \ | |
if (err != (expected)) { \ | |
printf("%s(%d): error in %s() -- %s returned %d\n", __FILE__, __LINE__, __FUNCTION__, #expr, err); \ | |
__debugbreak(); \ | |
} \ | |
assert(err == (expected)); \ | |
__pragma(warning(push)) \ | |
__pragma(warning(disable:4127)) \ | |
} while(0) \ | |
__pragma(warning(pop)) |
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