diff options
Diffstat (limited to 'src')
-rw-r--r-- | src/sys/mman.rs | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/src/sys/mman.rs b/src/sys/mman.rs index 2c23a13d..6d287eb8 100644 --- a/src/sys/mman.rs +++ b/src/sys/mman.rs @@ -39,6 +39,30 @@ mod consts { pub const PROT_GROWSDOWN: MmapProt = 0x01000000; pub const PROT_GROWSUP: MmapProt = 0x02000000; + pub type MmapAdvise = c_int; + + pub const MADV_NORMAL : MmapAdvise = 0; /* No further special treatment. */ + pub const MADV_RANDOM : MmapAdvise = 1; /* Expect random page references. */ + pub const MADV_SEQUENTIAL : MmapAdvise = 2; /* Expect sequential page references. */ + pub const MADV_WILLNEED : MmapAdvise = 3; /* Will need these pages. */ + pub const MADV_DONTNEED : MmapAdvise = 4; /* Don't need these pages. */ + pub const MADV_REMOVE : MmapAdvise = 9; /* Remove these pages and resources. */ + pub const MADV_DONTFORK : MmapAdvise = 10; /* Do not inherit across fork. */ + pub const MADV_DOFORK : MmapAdvise = 11; /* Do inherit across fork. */ + pub const MADV_MERGEABLE : MmapAdvise = 12; /* KSM may merge identical pages. */ + pub const MADV_UNMERGEABLE: MmapAdvise = 13; /* KSM may not merge identical pages. */ + pub const MADV_HUGEPAGE : MmapAdvise = 14; /* Worth backing with hugepages. */ + pub const MADV_NOHUGEPAGE : MmapAdvise = 15; /* Not worth backing with hugepages. */ + pub const MADV_DONTDUMP : MmapAdvise = 16; /* Explicity exclude from the core dump, overrides the coredump filter bits. */ + pub const MADV_DODUMP : MmapAdvise = 17; /* Clear the MADV_DONTDUMP flag. */ + pub const MADV_HWPOISON : MmapAdvise = 100; /* Poison a page for testing. */ + + pub type MmapSync = c_int; + + pub const MS_ASYNC : MmapSync = 1; + pub const MS_SYNC : MmapSync = 4; + pub const MS_INVALIDATE : MmapSync = 2; + pub const MAP_FAILED: int = -1; } @@ -61,6 +85,27 @@ mod consts { pub const PROT_WRITE: MmapProt = 0x2; pub const PROT_EXEC: MmapProt = 0x4; pub const PROT_NONE: MmapProt = 0x0; + + pub type MmapAdvise = c_int; + + pub const MADV_NORMAL : MmapAdvise = 0; /* No further special treatment. */ + pub const MADV_RANDOM : MmapAdvise = 1; /* Expect random page references. */ + pub const MADV_SEQUENTIAL : MmapAdvise = 2; /* Expect sequential page references. */ + pub const MADV_WILLNEED : MmapAdvise = 3; /* Will need these pages. */ + pub const MADV_DONTNEED : MmapAdvise = 4; /* Don't need these pages. */ + pub const MADV_FREE : MmapAdvise = 5; /* pages unneeded, discard contents */ + pub const MADV_ZERO_WIRED_PAGES: MmapAdvise = 6; /* zero the wired pages that have not been unwired before the entry is deleted */ + pub const MADV_FREE_REUSABLE : MmapAdvise = 7; /* pages can be reused (by anyone) */ + pub const MADV_FREE_REUSE : MmapAdvise = 8; /* caller wants to reuse those pages */ + pub const MADV_CAN_REUSE : MmapAdvise = 9; + + pub type MmapSync = c_int; + + pub const MS_ASYNC : MmapSync = 0x0001; /* [MF|SIO] return immediately */ + pub const MS_INVALIDATE : MmapSync = 0x0002; /* [MF|SIO] invalidate all cached data */ + pub const MS_SYNC : MmapSync = 0x0010; /* [MF|SIO] msync synchronously */ + pub const MS_KILLPAGES : MmapSync = 0x0004; /* invalidate pages, leave mapped */ + pub const MS_DEACTIVATE : MmapSync = 0x0008; /* deactivate pages, leave mapped */ pub const MAP_FAILED: int = -1; } @@ -76,6 +121,8 @@ mod ffi { pub fn shm_unlink(name: *const c_char) -> c_int; pub fn mlock(addr: *const c_void, len: size_t) -> c_int; pub fn munlock(addr: *const c_void, len: size_t) -> c_int; + pub fn madvise (addr: *const c_void, len: size_t, advice: c_int) -> c_int; + pub fn msync (addr: *const c_void, len: size_t, flags: c_int) -> c_int; } } @@ -112,6 +159,20 @@ pub fn munmap(addr: *mut c_void, len: size_t) -> SysResult<()> { } } +pub fn madvise(addr: *const c_void, length: size_t, advise: MmapAdvise) -> SysResult<()> { + match unsafe { ffi::madvise(addr, length, advise) } { + 0 => Ok(()), + _ => Err(SysError::last()) + } +} + +pub fn msync(addr: *const c_void, length: size_t, flags: MmapSync) -> SysResult<()> { + match unsafe { ffi::msync(addr, length, flags) } { + 0 => Ok(()), + _ => Err(SysError::last()) + } +} + pub fn shm_open(name: &String, flag: OFlag, mode: FilePermission) -> SysResult<Fd> { let ret = unsafe { ffi::shm_open(name.to_c_str().as_ptr(), flag.bits(), mode.bits() as mode_t) }; |