This module implements readers-writer locks.

Types

Rwlock = object users {.guard: g.}: int waitingWriters {.guard: g.}: int cond: Cond g: Lock: Readers-writer lock (multiple readers, single writer). Source Edit

Procs

proc acquireRead(rw: var Rwlock) {.inline, ...raises: [], tags: [].}: Acquires the given lock for reading. Source Edit
proc acquireWrite(rw: var Rwlock) {.inline, ...raises: [], tags: [].}: Acquires the given lock for writing. Source Edit
proc deinitLock(rw: var Rwlock) {.inline, ...raises: [], tags: [].}: Source Edit
proc initLock(rw: var Rwlock) {.inline, ...raises: [], tags: [].}: Source Edit
proc releaseRead(rw: var Rwlock) {.inline, ...raises: [], tags: [].}: Releases the given lock from reading. Source Edit
proc releaseWrite(rw: var Rwlock) {.inline, ...raises: [], tags: [].}: Releases the given lock from writing. Source Edit
proc tryAcquireRead(rw: var Rwlock): bool {.inline, ...raises: [], tags: [].}: Tries to acquire the given lock for reading. Returns true on success. Source Edit
proc tryAcquireWrite(rw: var Rwlock): bool {.inline, ...raises: [], tags: [].}: Tries to acquire the given lock for writing. Returns true on success. Source Edit

template withReadLock(rw: Rwlock; stmt: untyped): Acquires the given lock for reading, executes the statements in body and releases the lock after the statements finish executing. Source Edit
template withWriteLock(rw: Rwlock; stmt: untyped): Acquires the given lock for writing, executes the statements in body and releases the lock after the statements finish executing. Source Edit