src/libstd/sys/windows/sync.rs

   1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 use libc::{BOOL, DWORD, c_void, LPVOID};
  12 use libc::types::os::arch::extra::BOOLEAN;
  13
  14 pub type LPCRITICAL_SECTION = *mut c_void;
  15 pub type LPCONDITION_VARIABLE = *mut CONDITION_VARIABLE;
  16 pub type LPSRWLOCK = *mut SRWLOCK;
  17
  18 #[cfg(target_arch = "x86")]
  19 pub const CRITICAL_SECTION_SIZE: uint = 24;
  20 #[cfg(target_arch = "x86_64")]
  21 pub const CRITICAL_SECTION_SIZE: uint = 40;
  22
  23 #[repr(C)]
  24 pub struct CONDITION_VARIABLE { pub ptr: LPVOID }
  25 #[repr(C)]
  26 pub struct SRWLOCK { pub ptr: LPVOID }
  27
  28 pub const CONDITION_VARIABLE_INIT: CONDITION_VARIABLE = CONDITION_VARIABLE {
  29     ptr: 0 as *mut _,
  30 };
  31 pub const SRWLOCK_INIT: SRWLOCK = SRWLOCK { ptr: 0 as *mut _ };
  32
  33 extern "system" {
  34     // critical sections
  35     pub fn InitializeCriticalSectionAndSpinCount(
  36                     lpCriticalSection: LPCRITICAL_SECTION,
  37                     dwSpinCount: DWORD) -> BOOL;
  38     pub fn DeleteCriticalSection(lpCriticalSection: LPCRITICAL_SECTION);
  39     pub fn EnterCriticalSection(lpCriticalSection: LPCRITICAL_SECTION);
  40     pub fn LeaveCriticalSection(lpCriticalSection: LPCRITICAL_SECTION);
  41     pub fn TryEnterCriticalSection(lpCriticalSection: LPCRITICAL_SECTION) -> BOOL;
  42
  43     // condition variables
  44     pub fn SleepConditionVariableCS(ConditionVariable: LPCONDITION_VARIABLE,
  45                                     CriticalSection: LPCRITICAL_SECTION,
  46                                     dwMilliseconds: DWORD) -> BOOL;
  47     pub fn WakeConditionVariable(ConditionVariable: LPCONDITION_VARIABLE);
  48     pub fn WakeAllConditionVariable(ConditionVariable: LPCONDITION_VARIABLE);
  49
  50     // slim rwlocks
  51     pub fn AcquireSRWLockExclusive(SRWLock: LPSRWLOCK);
  52     pub fn AcquireSRWLockShared(SRWLock: LPSRWLOCK);
  53     pub fn ReleaseSRWLockExclusive(SRWLock: LPSRWLOCK);
  54     pub fn ReleaseSRWLockShared(SRWLock: LPSRWLOCK);
  55     pub fn TryAcquireSRWLockExclusive(SRWLock: LPSRWLOCK) -> BOOLEAN;
  56     pub fn TryAcquireSRWLockShared(SRWLock: LPSRWLOCK) -> BOOLEAN;
  57 }
  58