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// Requres GCC or Clang with `-fblocks` option available.
//
#ifndef KIT_DEFER_H
#define KIT_DEFER_H
#if !defined(__clang__) && !defined(__APPLE__)
# error C blocks support required
#endif
#ifdef __cplusplus
extern "C" {
#endif
#if defined(__GNUC__) || defined(__clang__)
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wunused-function"
# pragma GCC diagnostic ignored "-Wunknown-pragmas"
#endif
static void kit_defer_cleanup_(void (^*b)(void)) { (*b)(); }
#define kit_defer_merge_(a,b) a##b
#define kit_defer_varname_(a) \
kit_defer_merge_(kit_defer_scopevar_,a)
#define defer \
__attribute__((unused, cleanup(kit_defer_cleanup_))) \
void (^kit_defer_varname_(__COUNTER__))(void) = ^
#define defer_ref __block
#if defined(__GNUC__) || defined(__clang__)
# pragma GCC diagnostic pop
#endif
#ifdef __cplusplus
}
#endif
#endif
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