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4ef255b69d
* change SysLockType_Reentrant fix edge case where using SysLockType_Reentrant doesn't trigger an #include pthread.h * syslocktype_reentrant now a var * remove nodecl to remove empty system_syslocks.c * let is better than var. in reality SysLockType = enum, maybe that would be a better fix
56 lines
1.3 KiB
Nim
56 lines
1.3 KiB
Nim
#
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#
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# Nim's Runtime Library
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# (c) Copyright 2016 Anatoly Galiulin
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#
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# See the file "copying.txt", included in this
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# distribution, for details about the copyright.
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#
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## This module contains Nim's support for reentrant locks.
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when not compileOption("threads") and not defined(nimdoc):
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{.error: "Rlocks requires --threads:on option.".}
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const insideRLocksModule = true
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include "system/syslocks"
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type
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RLock* = SysLock ## Nim lock, re-entrant
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proc initRLock*(lock: var RLock) {.inline.} =
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## Initializes the given lock.
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when defined(posix):
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var a: SysLockAttr
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initSysLockAttr(a)
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setSysLockType(a, SysLockType_Reentrant)
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initSysLock(lock, a.addr)
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else:
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initSysLock(lock)
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proc deinitRLock*(lock: var RLock) {.inline.} =
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## Frees the resources associated with the lock.
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deinitSys(lock)
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proc tryAcquire*(lock: var RLock): bool =
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## Tries to acquire the given lock. Returns `true` on success.
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result = tryAcquireSys(lock)
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proc acquire*(lock: var RLock) =
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## Acquires the given lock.
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acquireSys(lock)
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proc release*(lock: var RLock) =
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## Releases the given lock.
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releaseSys(lock)
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template withRLock*(lock: var RLock, code: untyped): untyped =
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## Acquires the given lock and then executes the code.
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block:
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acquire(lock)
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defer:
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release(lock)
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{.locks: [lock].}:
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code
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