Added reentrant locks module to stdlib

1 files changed, 13 insertions, 1 deletions

diff --git a/lib/system/syslocks.nim b/lib/system/syslocks.nim
index 7a113b9d4..907a6c609 100644
--- a/lib/system/syslocks.nim
+++ b/lib/system/syslocks.nim
@@ -75,12 +75,24 @@ else:
   type
     SysLock {.importc: "pthread_mutex_t", pure, final,
                header: "<sys/types.h>".} = object
+    SysLockAttr {.importc: "pthread_mutexattr_t", pure, final
+               header: "<sys/types.h>".} = object
     SysCond {.importc: "pthread_cond_t", pure, final,
                header: "<sys/types.h>".} = object
+    SysLockType = distinct cint
+
+  proc SysLockType_Reentrant: SysLockType =
+    {.emit: "`result` = PTHREAD_MUTEX_RECURSIVE;".}
 
-  proc initSysLock(L: var SysLock, attr: pointer = nil) {.
+  proc initSysLock(L: var SysLock, attr: ptr SysLockAttr = nil) {.
     importc: "pthread_mutex_init", header: "<pthread.h>", noSideEffect.}
 
+  proc initSysLockAttr(a: var SysLockAttr) {.
+    importc: "pthread_mutexattr_init", header: "<pthread.h>", noSideEffect.}
+
+  proc setSysLockType(a: var SysLockAttr, t: SysLockType) {.
+    importc: "pthread_mutexattr_settype", header: "<pthread.h>", noSideEffect.}
+  
   proc acquireSys(L: var SysLock) {.noSideEffect,
     importc: "pthread_mutex_lock", header: "<pthread.h>".}
   proc tryAcquireSysAux(L: var SysLock): cint {.noSideEffect,