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defer simplified

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Timerix
2025-12-15 13:38:03 +05:00
parent 08d45faa83
commit 94b051e852
2 changed files with 32 additions and 11 deletions
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23
include/tlibc/defer.h
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@@ -17,18 +17,21 @@ void foo(){
#if defined(__GNUC__) || defined(__TINYC__)
#define Deferral(MAX_DEFER_STATEMENTS) \
unsigned char _num_deferrals = 0; \
void *_defer_return_loc = 0, *_deferrals[MAX_DEFER_STATEMENTS] = {0};
int _num_deferrals = 0; \
ATTRIBUTE_UNUSED void *_defer_return_loc = 0;\
ATTRIBUTE_UNUSED void *_deferrals[MAX_DEFER_STATEMENTS] = {0};
# define Defer(block) _Defer(block, __LINE__)
# define Return _Return(__LINE__)
#define _defer_token_cat(a, b) a ## b
#ifndef CAT2
#define CAT2(a, b) a ## b
#endif
#define _Defer(block, n) do { \
_deferrals[_num_deferrals++] = && _defer_token_cat(_defer_ini, n); \
_deferrals[_num_deferrals++] = && CAT2(_defer_ini, n); \
if (0) { \
_defer_token_cat(_defer_ini, n): \
CAT2(_defer_ini, n): \
block; \
if (_num_deferrals) { \
goto *_deferrals[--_num_deferrals]; \
@@ -39,13 +42,11 @@ void foo(){
} while (0)
#define _Return(n) \
if (_num_deferrals \
/* this nonsense disables warning Wunused-but-set-variable */ \
&& _defer_return_loc == _defer_return_loc ) \
if (_num_deferrals) \
{ \
_defer_return_loc = && _defer_token_cat(_defer_fini_, n); \
_defer_return_loc = && CAT2(_defer_fini_, n); \
goto *_deferrals[--_num_deferrals]; \
} else _defer_token_cat(_defer_fini_, n): \
} else CAT2(_defer_fini_, n): \
return
#else /* !__GNUC__ && !__TINYCC__ */
@@ -59,7 +60,7 @@ void foo(){
#endif
#define Deferral(MAX_DEFER_STATEMENTS) \
volatile unsigned char _num_deferrals = 0; \
volatile int _num_deferrals = 0; \
jmp_buf _defer_return_loc = {0}, _deferrals[MAX_DEFER_STATEMENTS] = {0};
#define Defer(block) do { \

20
include/tlibc/std.h
View File

@@ -59,6 +59,8 @@ typedef void (*Destructor_t)(void* self);
#define dbg(N) printf("\e[95m%d\n",N)
#define nameof(V) #V
#define CAT2(a, b) a ## b
#define CAT3(a, b, c) a ## b ## c
#define ARRAY_LEN(A) (sizeof(A)/sizeof(A[0]))
#define ALIGN_TO(_SIZE,_ALIGN) (((_SIZE) + ((_ALIGN) - 1)) & ~((_ALIGN) - 1))
@@ -122,6 +124,24 @@ typedef void (*Destructor_t)(void* self);
#define ATTRIBUTE_THREAD_LOCAL __thread
#endif
#ifdef _MSC_VER
#define PRAGMA_WARNING_PUSH __pragma(warning( push ))
#define PRAGMA_WARNING_POP __pragma(warning( pop ))
#define PRAGMA_WARNING_DISABLE(wNumber) __pragma(warning( disable : wNumber ))
#define W_RETURN_TYPE
#else
#define _PRAGMA(P) _Pragma(#P)
#define PRAGMA_WARNING_PUSH _PRAGMA(GCC diagnostic push)
#define PRAGMA_WARNING_POP _PRAGMA(GCC diagnostic pop)
#define PRAGMA_WARNING_DISABLE(wName) _PRAGMA(GCC diagnostic ignored wName)
#define W_RETURN_TYPE "-Wreturn-type"
#endif
#define WARNING_DISABLE(WARNING, CODE...) \
PRAGMA_WARNING_PUSH \
PRAGMA_WARNING_DISABLE(WARNING) \
CODE; \
PRAGMA_WARNING_POP
#if __cplusplus
}
#endif