793446cbdc
Covers the macro ARRAY_SIZE() and STRNCPY. The problem this change is aimed to solve it to provide cross-platform compiler-independent safe way pf ensuring that the functions are used correctly. The type safety was only ensured for GCC and only for C. The C++ language and Clang compiler would not have detected issues of passing bare pointer to neither of those macros. Now the STRNCPY() will only accept a bounded array as the destination argument, on any compiler. The ARRAY_SIZE as well, but there are a bit more complications to it in terms of transparency of the change. In one place the ARRAY_SIZE was used on float3 type. This worked in the old code because the type implements subscript operator, and the type consists of 3 floats. One would argue this is somewhat hidden/implicit behavior, which better be avoided. So an in-lined value of 3 is used now there. Another place is the ARRAY_SIZE used to define a bounded array of the size which matches bounded array which is a member of a struct. While the ARRAY_SIZE provides proper size in this case, the compiler does not believe that the value is known at compile time and errors out with a message that construction of variable-size arrays is not supported. Solved by converting the field to std::array<> and adding dedicated utility to get size of std::array at compile time. There might be a better way of achieving the same result, or maybe the approach is fine and just need to find a better place for such utility. Surely, more macro from the BLI_string.h can be covered with the C++ inlined functions, but need to start somewhere. There are also quite some changes to ensure the C linkage is not enforced by code which includes the headers. Pull Request: https://projects.blender.org/blender/blender/pulls/108041
143 lines
3.5 KiB
C
143 lines
3.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/** \file
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* \ingroup intern_memutil
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*/
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#ifndef __MEM_CACHELIMITERC_API_H__
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#define __MEM_CACHELIMITERC_API_H__
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#include "BLI_utildefines.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct MEM_CacheLimiter_s;
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struct MEM_CacheLimiterHandle_s;
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typedef struct MEM_CacheLimiter_s MEM_CacheLimiterC;
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typedef struct MEM_CacheLimiterHandle_s MEM_CacheLimiterHandleC;
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/* function used to remove data from memory */
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typedef void (*MEM_CacheLimiter_Destruct_Func)(void *);
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/* function used to measure stored data element size */
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typedef size_t (*MEM_CacheLimiter_DataSize_Func)(void *);
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/* function used to measure priority of item when freeing memory */
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typedef int (*MEM_CacheLimiter_ItemPriority_Func)(void *, int);
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/* function to check whether item could be destroyed */
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typedef bool (*MEM_CacheLimiter_ItemDestroyable_Func)(void *);
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#ifndef __MEM_CACHELIMITER_H__
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void MEM_CacheLimiter_set_maximum(size_t m);
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size_t MEM_CacheLimiter_get_maximum(void);
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void MEM_CacheLimiter_set_disabled(bool disabled);
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bool MEM_CacheLimiter_is_disabled(void);
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#endif /* __MEM_CACHELIMITER_H__ */
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/**
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* Create new MEM_CacheLimiter object
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* managed objects are destructed with the data_destructor
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*
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* \param data_destructor: TODO.
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* \return A new #MEM_CacheLimter object.
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*/
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MEM_CacheLimiterC *new_MEM_CacheLimiter(MEM_CacheLimiter_Destruct_Func data_destructor,
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MEM_CacheLimiter_DataSize_Func data_size);
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/**
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* Delete MEM_CacheLimiter
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*
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* Frees the memory of the CacheLimiter but does not touch managed objects!
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*
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* \param This: "This" pointer.
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*/
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void delete_MEM_CacheLimiter(MEM_CacheLimiterC *This);
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/**
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* Manage object
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*
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* \param This: "This" pointer, data object to manage.
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* \return The handle to reference/unreference & touch the managed object.
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*/
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MEM_CacheLimiterHandleC *MEM_CacheLimiter_insert(MEM_CacheLimiterC *This, void *data);
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/**
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* Free objects until memory constraints are satisfied
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*
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* \param This: "This" pointer.
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*/
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void MEM_CacheLimiter_enforce_limits(MEM_CacheLimiterC *This);
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/**
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* Unmanage object previously inserted object.
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* Does _not_ delete managed object!
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*
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* \param handle: of object.
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*/
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void MEM_CacheLimiter_unmanage(MEM_CacheLimiterHandleC *handle);
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/**
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* Raise priority of object (put it at the tail of the deletion chain)
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*
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* \param handle: of object.
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*/
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void MEM_CacheLimiter_touch(MEM_CacheLimiterHandleC *handle);
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/**
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* Increment reference counter. Objects with reference counter != 0 are _not_
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* deleted.
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*
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* \param handle: of object.
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*/
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void MEM_CacheLimiter_ref(MEM_CacheLimiterHandleC *handle);
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/**
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* Decrement reference counter. Objects with reference counter != 0 are _not_
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* deleted.
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*
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* \param handle: of object.
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*/
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void MEM_CacheLimiter_unref(MEM_CacheLimiterHandleC *handle);
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/**
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* Get reference counter.
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*
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* \param handle: of object.
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*/
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int MEM_CacheLimiter_get_refcount(MEM_CacheLimiterHandleC *handle);
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/**
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* Get pointer to managed object
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*
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* \param handle: of object.
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*/
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void *MEM_CacheLimiter_get(MEM_CacheLimiterHandleC *handle);
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void MEM_CacheLimiter_ItemPriority_Func_set(MEM_CacheLimiterC *This,
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MEM_CacheLimiter_ItemPriority_Func item_priority_func);
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void MEM_CacheLimiter_ItemDestroyable_Func_set(
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MEM_CacheLimiterC *This, MEM_CacheLimiter_ItemDestroyable_Func item_destroyable_func);
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size_t MEM_CacheLimiter_get_memory_in_use(MEM_CacheLimiterC *This);
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#ifdef __cplusplus
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}
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#endif
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#endif // __MEM_CACHELIMITERC_API_H__
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