module Rw_mutex: sig .. end
Read/write mutexes
Author(s): Markus Mottl <mmottl@janestreet.com>
Types
Real types
type 'pref t
Type of r/w mutexes
Phantom types
type [ `NoPref | `Readers | `Writers ]
Preference for readers, writers, or no preference
type 'pref kind
Preference kind of read/write mutexes
Phantom values
val r_pref : [ `Readers ] kind
r_pref preference kind for readers.
val w_pref : [ `Writers ] kind
w_pref preference kind for writers.
val np_pref : [ `NoPref ] kind
np_pref no preference for readers or writers.
Mutex operations
val create : 'pref kind -> 'pref t
create pref
Returns a r/w-mutex with preference kind pref.
val r_lock : [< pref ] t -> unit
r_lock mtx locks mtx for a reader.
val r_unlock : [< pref ] t -> unit
r_unlock mtx unlocks mtx for a reader.
val w_lock : [< pref ] t -> unit
w_lock mtx locks mtx for a writer.
val w_unlock : [< pref ] t -> unit
w_unlock mtx unlocks mtx for a writer.
val try_r_lock : [< pref ] t -> bool
try_r_lock mtx tries to lock mtx for a reader without blocking.
Returns true iff mtx could be locked, false otherwise.
val try_w_lock : [< pref ] t -> bool
try_w_lock mtx tries to lock mtx for a writer without blocking.
Returns true iff mtx could be locked, false otherwise.
val wrap_r_lock : [< pref ] t -> (unit -> 'a) -> 'a
wrap_r_lock mtx f locks mtx for a reader, executes f and
unlocks the mutex again.
Returns the result of f.
val try_wrap_r_lock : [< pref ] t -> (unit -> 'a) -> 'a option
try_wrap_r_lock mtx f tries to lock mtx for a reader without
blocking, executes f and unlocks the mutex again.
Returns Some
res, where res is the result of f, iff the mutex could be locked,
None otherwise.
val btry_wrap_r_lock : [< pref ] t -> (unit -> unit) -> bool
btry_wrap_r_lock mtx f tries to lock mtx for a reader without
blocking, executes f and unlocks the mutex again.
Returns true
iff the mutex could be locked, false otherwise.
val wrap_w_lock : [< pref ] t -> (unit -> 'a) -> 'a
wrap_w_lock mtx f locks mtx for a writer, executes f and
unlocks the mutex again.
Returns the result of f.
val try_wrap_w_lock : [< pref ] t -> (unit -> 'a) -> 'a option
try_wrap_w_lock mtx f tries to lock mtx for a writer without
blocking, executes f and unlocks the mutex again.
Returns Some
res, where res is the result of f, iff the mutex could be locked,
None otherwise.
val btry_wrap_w_lock : [< pref ] t -> (unit -> unit) -> bool