mirror of https://github.com/OpenTTD/OpenTTD.git
43 lines
1.5 KiB
C++
43 lines
1.5 KiB
C++
/* $Id$ */
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/** @file helpers.hpp */
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#ifndef HELPERS_HPP
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#define HELPERS_HPP
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/** When allocating using malloc/calloc in C++ it is usually needed to cast the return value
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* from void* to the proper pointer type. Another alternative would be MallocT<> as follows */
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template <typename T> FORCEINLINE T* MallocT(size_t num_elements)
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{
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T *t_ptr = (T*)malloc(num_elements * sizeof(T));
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if (t_ptr == NULL && num_elements != 0) error("Out of memory. Cannot allocate %i bytes", num_elements * sizeof(T));
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return t_ptr;
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}
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/** When allocating using malloc/calloc in C++ it is usually needed to cast the return value
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* from void* to the proper pointer type. Another alternative would be MallocT<> as follows */
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template <typename T> FORCEINLINE T* CallocT(size_t num_elements)
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{
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T *t_ptr = (T*)calloc(num_elements, sizeof(T));
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if (t_ptr == NULL && num_elements != 0) error("Out of memory. Cannot allocate %i bytes", num_elements * sizeof(T));
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return t_ptr;
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}
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/** When allocating using malloc/calloc in C++ it is usually needed to cast the return value
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* from void* to the proper pointer type. Another alternative would be MallocT<> as follows */
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template <typename T> FORCEINLINE T* ReallocT(T* t_ptr, size_t num_elements)
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{
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t_ptr = (T*)realloc(t_ptr, num_elements * sizeof(T));
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if (t_ptr == NULL && num_elements != 0) error("Out of memory. Cannot reallocate %i bytes", num_elements * sizeof(T));
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return t_ptr;
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}
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/** type safe swap operation */
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template<typename T> void Swap(T& a, T& b)
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{
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T t = a;
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a = b;
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b = t;
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}
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#endif /* HELPERS_HPP */
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