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Introduce mmap hooks interface. That should resolve #53 and resolve #155

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Roman Gershman 2020-05-29 12:04:42 +03:00
parent a09a64e29b
commit f89ab5601d
2 changed files with 99 additions and 24 deletions
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19
include/mimalloc.h
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@ -323,6 +323,25 @@ mi_decl_export void mi_option_set(mi_option_t option, long value);
mi_decl_export void mi_option_set_default(mi_option_t option, long value);
typedef enum mi_mmap_flag_e {
// mmap wrapper may allocate from huge pages.
// mmap wrapper should not use huge pages if this flag not set.
mi_mmap_allow_large = 0x1,
// mmap wrapper must allocate from huge pages (mi_mmap_allow_large will be set as well).
mi_mmap_large_only = 0x2,
mi_mmap_commit = 0x4,
} mi_mmap_flag_t;
typedef unsigned int mi_mmap_flags_t;
typedef void* (mi_cdecl mi_mmap_fun)(void* addr, size_t size, size_t try_alignment, mi_mmap_flags_t mmap_flags, void* arg, bool* is_large);
mi_decl_export void mi_register_mmap_fun(mi_mmap_fun* callback, void* arg) mi_attr_noexcept;
// Returns true on error, false otherwise.
typedef bool (mi_cdecl mi_munmap_fun)(void* addr, size_t size, void* arg);
mi_decl_export void mi_register_munmap_fun(mi_munmap_fun* callback, void* arg) mi_attr_noexcept;
// -------------------------------------------------------------------------------------------------------
// "mi" prefixed implementations of various posix, Unix, Windows, and C++ allocation functions.
// (This can be convenient when providing overrides of these functions as done in `mimalloc-override.h`.)