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Klemen Plestenjak
2024-01-28 21:40:45 +01:00
parent 73082f9d1d
commit 410c3d217e
1 changed files with 0 additions and 63 deletions
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63
engine/breeze/util/lambda.h
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@@ -1,63 +0,0 @@
#ifndef BREEZE_LAMBDA_H
#define BREEZE_LAMBDA_H
#include "../memory/memory.h"
typedef struct BzLambda BzLambda;
typedef void (*BzLambdaFn)(BzLambda *lambda, ...);
#define BZ_LAMBDA_STACK_SIZE 52
struct BzLambda {
BzLambdaFn fn;
i32 captureSize;
/* stack contents */
u8 stack[BZ_LAMBDA_STACK_SIZE];
};
static_assert(sizeof(BzLambda) == 64, "");
#define BZ_LAMBDA(lambdaName) \
(BzLambda) { \
.fn = (BzLambdaFn) lambdaName \
}
#define BZ_LAMBDA_BEGIN_CAPTURE(lambda) \
do { \
BzLambda *_lam = (lambda); \
_lam->captureSize = 0; \
} while (0)
#define BZ_LAMBDA_CAPTURE(lambda, var) \
do { \
BzLambda *_lam = (lambda); \
i32 _stackSize = _lam->captureSize; \
i32 _varSize = sizeof(var); \
assert(_stackSize + _varSize < (i32) sizeof(_lam->stack)); \
void *_location = &(var); \
bzMemCpy(&_lam->stack[_stackSize], _location, _varSize); \
_lam->captureSize += _varSize; \
} while (0)
#define BZ_LAMBDA_UNPACK_START() int32_t _stackOffset = 0
#define BZ_LAMBDA_UNPACK(type, name) \
type name = (_stackOffset += sizeof(type), \
assert(_stackOffset <= _lam->captureSize), \
*(type *) &_lam->stack[_stackOffset - sizeof(type)])
#define BZ_LAMBDA_CAST_RET(retType) (retType(*)(BzLambda *, ...))
/*
* Note: C99 requires at least one argument for "..." in variadic macro,
* so we need to have 2 variants of CLAMBDA_CALL and CLAMBDA_DECL.
*/
#define BZ_LAMBDA_CALL(lambda, retType, ...) ((BZ_LAMBDA_CAST_RET(retType)((lambda)->fn))(lambda, ##__VA_ARGS__))
#define BZ_LAMBDA_NOP_CALL(lambda, retType) ((BZ_LAMBDA_CAST_RET(retType)((lambda)->fn))(lambda))
#define BZ_LAMBDA_DECL(lambdaName, ...) lambdaName(BzLambda *_lam, ##__VA_ARGS__)
#define BZ_LAMBDA_NOP_DECL(lambdaName) lambdaName(BzLambda *_lam)
#endif // BREEZE_LAMBDA_H