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add initial support for _mi_prim_reuse and MADV_FREE_REUSABLE on macOS (issue #1097)

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Daan 2025-06-06 17:59:46 -07:00
parent 2d34956bed
commit d389819cc9
8 changed files with 64 additions and 7 deletions
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1
include/mimalloc/internal.h
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@ -167,6 +167,7 @@ bool _mi_os_decommit(void* addr, size_t size);
bool _mi_os_unprotect(void* addr, size_t size);
bool _mi_os_purge(void* p, size_t size);
bool _mi_os_purge_ex(void* p, size_t size, bool allow_reset, size_t stat_size);
void _mi_os_reuse(void* p, size_t size);
mi_decl_nodiscard bool _mi_os_commit(void* p, size_t size, bool* is_zero);
mi_decl_nodiscard bool _mi_os_commit_ex(void* addr, size_t size, bool* is_zero, size_t stat_size);
mi_decl_nodiscard bool _mi_os_protect(void* addr, size_t size);

5
include/mimalloc/prim.h
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@ -63,6 +63,11 @@ int _mi_prim_decommit(void* addr, size_t size, bool* needs_recommit);
// Returns error code or 0 on success.
int _mi_prim_reset(void* addr, size_t size);
// Reuse memory. This is called for memory that is already committed but
// may have been reset (`_mi_prim_reset`) or decommitted (`_mi_prim_decommit`) where `needs_recommit` was false.
// Returns error code or 0 on success. On most platforms this is a no-op.
int _mi_prim_reuse(void* addr, size_t size);
// Protect memory. Returns error code or 0 on success.
int _mi_prim_protect(void* addr, size_t size, bool protect);