diff --git a/folly/detail/Malloc.h b/folly/detail/Malloc.h index 2a04ff284777a8e38c99df59866afc6ea00c3eb5..323a94e9127fa724792239d3ddae176f49cdcdba 100644 --- a/folly/detail/Malloc.h +++ b/folly/detail/Malloc.h @@ -36,6 +36,39 @@ int mallctl(const char*, void*, size_t*, void*, size_t) int mallctlnametomib(const char*, size_t*, size_t*) __attribute__((__weak__)); int mallctlbymib(const size_t*, size_t, void*, size_t*, void*, size_t) __attribute__((__weak__)); +#elif defined(_MSC_VER) +// MSVC doesn't have weak symbols, so do some linker magic +// to emulate them. +extern void* (*mallocx)(size_t, int); +extern const char* mallocxWeak = nullptr; +#pragma comment(linker, "/alternatename:_mallocx=_mallocxWeak") +extern void* (*rallocx)(void*, size_t, int); +extern const char* rallocxWeak = nullptr; +#pragma comment(linker, "/alternatename:_rallocx=_rallocxWeak") +extern size_t(*xallocx)(void*, size_t, size_t, int); +extern const char* xallocxWeak = nullptr; +#pragma comment(linker, "/alternatename:_xallocx=_xallocxWeak") +extern size_t(*sallocx)(const void*, int); +extern const char* sallocxWeak = nullptr; +#pragma comment(linker, "/alternatename:_sallocx=_sallocxWeak") +extern void(*dallocx)(void*, int); +extern const char* dallocxWeak = nullptr; +#pragma comment(linker, "/alternatename:_dallocx=_dallocxWeak") +extern void(*sdallocx)(void*, size_t, int); +extern const char* sdallocxWeak = nullptr; +#pragma comment(linker, "/alternatename:_sdallocx=_sdallocxWeak") +extern size_t(*nallocx)(size_t, int); +extern const char* nallocxWeak = nullptr; +#pragma comment(linker, "/alternatename:_nallocx=_nallocxWeak") +extern int(*mallctl)(const char*, void*, size_t*, void*, size_t); +extern const char* mallctlWeak = nullptr; +#pragma comment(linker, "/alternatename:_mallctl=_mallctlWeak") +extern int(*mallctlnametomib)(const char*, size_t*, size_t*); +extern const char* mallctlnametomibWeak = nullptr; +#pragma comment(linker, "/alternatename:_mallctlnametomib=_mallctlnametomibWeak") +extern int(*mallctlbymib)(const size_t*, size_t, void*, size_t*, void*, size_t); +extern const char* mallctlbymibWeak = nullptr; +#pragma comment(linker, "/alternatename:_mallctlbymib=_mallctlbymibWeak") #else extern void* (*mallocx)(size_t, int); extern void* (*rallocx)(void*, size_t, int);