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70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
4 years ago
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#ifndef BINDDESTR_H
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#define BINDDESTR_H
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#include <functional>
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// Binds a particular destructor function to the type, automatically destroying it
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template<typename T, void (*D)(T *)>
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struct BindDestr
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{
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T *inner;
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BindDestr(BindDestr &other) = delete;
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BindDestr(BindDestr &&other) {
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this->inner = other.inner;
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other.inner = NULL;
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}
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BindDestr(T *inner2)
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: inner(inner2) {}
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~BindDestr() {
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if (this->inner) {
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D(this->inner);
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}
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}
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inline operator const T *() const {
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return this->inner;
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}
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inline T *invalidate() {
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T *ret = this->inner;
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this->inner = NULL;
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return ret;
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}
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};
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// Wrap a C function with a particular class prefix (removes it in the class function)
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// and specified return type
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#define WRAP_FN_TYPE(TYPE, CLASS, FNAME) \
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template<typename... Args> \
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inline TYPE FNAME (Args... args) { \
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return :: CLASS##_##FNAME (this->inner, args...); \
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}
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// Wrap a C function with a particular class prefix (removes it in the class function)
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#define WRAP_FN(CLASS, FNAME) WRAP_FN_TYPE(std::function<decltype( :: CLASS##_##FNAME )>::result_type, CLASS, FNAME)
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// Same, but invalidates the pointer
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#define WRAP_FN_TYPE_INVALIDATE(TYPE, CLASS, FNAME) \
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template<typename... Args> \
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inline TYPE FNAME (Args... args) { \
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return :: CLASS##_##FNAME (this->invalidate(), args...); \
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}
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#define WRAP_FN_INVALIDATE(CLASS, FNAME) WRAP_FN_TYPE_INVALIDATE(std::function<decltype( :: CLASS##_##FNAME )>::result_type, CLASS, FNAME)
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// Wrap a C function in a raw way with specified return type
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#define WRAP_FN_RAW_TYPE(TYPE, FNAME) \
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template<typename... Args> \
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inline TYPE FNAME (Args... args) { \
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return :: FNAME (this->inner, args...); \
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}
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// Wrap a C function in a raw way
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#define WRAP_FN_RAW(FNAME) WRAP_FN_RAW_TYPE(std::function<decltype( :: FNAME )>::result_type, FNAME)
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#endif
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