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include/mimalloc.h: build cleanly with more compile-time checks

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1. check whether `__cplusplus` is defined before checking for C++17
   when defining `mi_decl_nodiscard`.  Flagged by `gcc -Wundef`.

2. give `mi_is_redirected` a full prototype in C: an empty argument
   list leave it undefined.  Flagged by `gcc -Wstrict-prototypes`.
This commit is contained in:
Paul Khuong 2020-08-07 11:36:10 -04:00
parent a9686d6ecf
commit 08558de985
1 changed files with 2 additions and 2 deletions
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4
include/mimalloc.h
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@ -24,7 +24,7 @@ terms of the MIT license. A copy of the license can be found in the file
#define mi_attr_noexcept
#endif
#if (__cplusplus >= 201703)
#if defined(__cplusplus) && (__cplusplus >= 201703)
#define mi_decl_nodiscard [[nodiscard]]
#elif (__GNUC__ >= 4) || defined(__clang__) // includes clang, icc, and clang-cl
#define mi_decl_nodiscard __attribute__((warn_unused_result))
@ -256,7 +256,7 @@ mi_decl_export bool mi_heap_visit_blocks(const mi_heap_t* heap, bool visit_all_b
// Experimental
mi_decl_nodiscard mi_decl_export bool mi_is_in_heap_region(const void* p) mi_attr_noexcept;
mi_decl_nodiscard mi_decl_export bool mi_is_redirected() mi_attr_noexcept;
mi_decl_nodiscard mi_decl_export bool mi_is_redirected(void) mi_attr_noexcept;
mi_decl_export int mi_reserve_huge_os_pages_interleave(size_t pages, size_t numa_nodes, size_t timeout_msecs) mi_attr_noexcept;
mi_decl_export int mi_reserve_huge_os_pages_at(size_t pages, int numa_node, size_t timeout_msecs) mi_attr_noexcept;