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convert std::arc types to camelcase

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This commit is contained in:
Ben Blum 2012-08-26 21:28:36 -04:00
parent 5dadee1ee7
commit 09ae370c62
2 changed files with 79 additions and 77 deletions
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155
src/libstd/arc.rs
View File

@ -13,15 +13,16 @@ import sync;
import sync::{Mutex, mutex, mutex_with_condvars,
RWlock, rwlock, rwlock_with_condvars};
export arc, clone, get;
export condvar, mutex_arc, mutex_arc_with_condvars, unwrap_mutex_arc;
export rw_arc, rw_arc_with_condvars, rw_write_mode, rw_read_mode;
export ARC, arc, clone, get;
export Condvar;
export MutexARC, mutex_arc, mutex_arc_with_condvars, unwrap_mutex_arc;
export RWARC, rw_arc, rw_arc_with_condvars, RWWriteMode, RWReadMode;
export unwrap_rw_arc;
/// As sync::condvar, a mechanism for unlock-and-descheduling and signalling.
struct condvar { is_mutex: bool; failed: &mut bool; cond: &sync::Condvar; }
struct Condvar { is_mutex: bool; failed: &mut bool; cond: &sync::Condvar; }
impl &condvar {
impl &Condvar {
/// Atomically exit the associated ARC and block until a signal is sent.
#[inline(always)]
fn wait() { self.wait_on(0) }
@ -69,18 +70,18 @@ impl &condvar {
****************************************************************************/
/// An atomically reference counted wrapper for shared immutable state.
struct arc<T: const send> { x: SharedMutableState<T>; }
struct ARC<T: const send> { x: SharedMutableState<T>; }
/// Create an atomically reference counted wrapper.
fn arc<T: const send>(+data: T) -> arc<T> {
arc { x: unsafe { shared_mutable_state(data) } }
fn arc<T: const send>(+data: T) -> ARC<T> {
ARC { x: unsafe { shared_mutable_state(data) } }
}
/**
* Access the underlying data in an atomically reference counted
* wrapper.
*/
fn get<T: const send>(rc: &arc<T>) -> &T {
fn get<T: const send>(rc: &ARC<T>) -> &T {
unsafe { get_shared_immutable_state(&rc.x) }
}
@ -91,8 +92,8 @@ fn get<T: const send>(rc: &arc<T>) -> &T {
* object. However, one of the `arc` objects can be sent to another task,
* allowing them to share the underlying data.
*/
fn clone<T: const send>(rc: &arc<T>) -> arc<T> {
arc { x: unsafe { clone_shared_mutable_state(&rc.x) } }
fn clone<T: const send>(rc: &ARC<T>) -> ARC<T> {
ARC { x: unsafe { clone_shared_mutable_state(&rc.x) } }
}
/**
@ -104,8 +105,8 @@ fn clone<T: const send>(rc: &arc<T>) -> arc<T> {
* unwrap from a task that holds another reference to the same ARC; it is
* guaranteed to deadlock.
*/
fn unwrap<T: const send>(+rc: arc<T>) -> T {
let arc { x: x } = rc;
fn unwrap<T: const send>(+rc: ARC<T>) -> T {
let ARC { x: x } = rc;
unsafe { unwrap_shared_mutable_state(x) }
}
@ -114,12 +115,12 @@ fn unwrap<T: const send>(+rc: arc<T>) -> T {
****************************************************************************/
#[doc(hidden)]
struct mutex_arc_inner<T: send> { lock: Mutex; failed: bool; data: T; }
struct MutexARCInner<T: send> { lock: Mutex; failed: bool; data: T; }
/// An ARC with mutable data protected by a blocking mutex.
struct mutex_arc<T: send> { x: SharedMutableState<mutex_arc_inner<T>>; }
struct MutexARC<T: send> { x: SharedMutableState<MutexARCInner<T>>; }
/// Create a mutex-protected ARC with the supplied data.
fn mutex_arc<T: send>(+user_data: T) -> mutex_arc<T> {
fn mutex_arc<T: send>(+user_data: T) -> MutexARC<T> {
mutex_arc_with_condvars(user_data, 1)
}
/**
@ -127,19 +128,19 @@ fn mutex_arc<T: send>(+user_data: T) -> mutex_arc<T> {
* of condvars (as sync::mutex_with_condvars).
*/
fn mutex_arc_with_condvars<T: send>(+user_data: T,
num_condvars: uint) -> mutex_arc<T> {
num_condvars: uint) -> MutexARC<T> {
let data =
mutex_arc_inner { lock: mutex_with_condvars(num_condvars),
MutexARCInner { lock: mutex_with_condvars(num_condvars),
failed: false, data: user_data };
mutex_arc { x: unsafe { shared_mutable_state(data) } }
MutexARC { x: unsafe { shared_mutable_state(data) } }
}
impl<T: send> &mutex_arc<T> {
impl<T: send> &MutexARC<T> {
/// Duplicate a mutex-protected ARC, as arc::clone.
fn clone() -> mutex_arc<T> {
fn clone() -> MutexARC<T> {
// NB: Cloning the underlying mutex is not necessary. Its reference
// count would be exactly the same as the shared state's.
mutex_arc { x: unsafe { clone_shared_mutable_state(&self.x) } }
MutexARC { x: unsafe { clone_shared_mutable_state(&self.x) } }
}
/**
@ -172,19 +173,19 @@ impl<T: send> &mutex_arc<T> {
// unsafe. See borrow_rwlock, far below.
do (&state.lock).lock {
check_poison(true, state.failed);
let _z = poison_on_fail(&mut state.failed);
let _z = PoisonOnFail(&mut state.failed);
blk(&mut state.data)
}
}
/// As access(), but with a condvar, as sync::mutex.lock_cond().
#[inline(always)]
unsafe fn access_cond<U>(blk: fn(x: &x/mut T, c: &c/condvar) -> U) -> U {
unsafe fn access_cond<U>(blk: fn(x: &x/mut T, c: &c/Condvar) -> U) -> U {
let state = unsafe { get_shared_mutable_state(&self.x) };
do (&state.lock).lock_cond |cond| {
check_poison(true, state.failed);
let _z = poison_on_fail(&mut state.failed);
let _z = PoisonOnFail(&mut state.failed);
blk(&mut state.data,
&condvar { is_mutex: true, failed: &mut state.failed,
&Condvar { is_mutex: true, failed: &mut state.failed,
cond: cond })
}
}
@ -197,12 +198,12 @@ impl<T: send> &mutex_arc<T> {
* Will additionally fail if another task has failed while accessing the arc.
*/
// FIXME(#2585) make this a by-move method on the arc
fn unwrap_mutex_arc<T: send>(+arc: mutex_arc<T>) -> T {
let mutex_arc { x: x } = arc;
fn unwrap_mutex_arc<T: send>(+arc: MutexARC<T>) -> T {
let MutexARC { x: x } = arc;
let inner = unsafe { unwrap_shared_mutable_state(x) };
let mutex_arc_inner { failed: failed, data: data, _ } = inner;
let MutexARCInner { failed: failed, data: data, _ } = inner;
if failed {
fail ~"Can't unwrap poisoned mutex_arc - another task failed inside!"
fail ~"Can't unwrap poisoned MutexARC - another task failed inside!"
}
data
}
@ -213,7 +214,7 @@ fn unwrap_mutex_arc<T: send>(+arc: mutex_arc<T>) -> T {
fn check_poison(is_mutex: bool, failed: bool) {
if failed {
if is_mutex {
fail ~"Poisoned mutex_arc - another task failed inside!";
fail ~"Poisoned MutexARC - another task failed inside!";
} else {
fail ~"Poisoned rw_arc - another task failed inside!";
}
@ -221,7 +222,7 @@ fn check_poison(is_mutex: bool, failed: bool) {
}
#[doc(hidden)]
struct poison_on_fail {
struct PoisonOnFail {
failed: &mut bool;
new(failed: &mut bool) { self.failed = failed; }
drop {
@ -235,20 +236,20 @@ struct poison_on_fail {
****************************************************************************/
#[doc(hidden)]
struct rw_arc_inner<T: const send> { lock: RWlock; failed: bool; data: T; }
struct RWARCInner<T: const send> { lock: RWlock; failed: bool; data: T; }
/**
* A dual-mode ARC protected by a reader-writer lock. The data can be accessed
* mutably or immutably, and immutably-accessing tasks may run concurrently.
*
* Unlike mutex_arcs, rw_arcs are safe, because they cannot be nested.
*/
struct rw_arc<T: const send> {
x: SharedMutableState<rw_arc_inner<T>>;
struct RWARC<T: const send> {
x: SharedMutableState<RWARCInner<T>>;
mut cant_nest: ();
}
/// Create a reader/writer ARC with the supplied data.
fn rw_arc<T: const send>(+user_data: T) -> rw_arc<T> {
fn rw_arc<T: const send>(+user_data: T) -> RWARC<T> {
rw_arc_with_condvars(user_data, 1)
}
/**
@ -256,18 +257,18 @@ fn rw_arc<T: const send>(+user_data: T) -> rw_arc<T> {
* of condvars (as sync::rwlock_with_condvars).
*/
fn rw_arc_with_condvars<T: const send>(+user_data: T,
num_condvars: uint) -> rw_arc<T> {
num_condvars: uint) -> RWARC<T> {
let data =
rw_arc_inner { lock: rwlock_with_condvars(num_condvars),
failed: false, data: user_data };
rw_arc { x: unsafe { shared_mutable_state(data) }, cant_nest: () }
RWARCInner { lock: rwlock_with_condvars(num_condvars),
failed: false, data: user_data };
RWARC { x: unsafe { shared_mutable_state(data) }, cant_nest: () }
}
impl<T: const send> &rw_arc<T> {
impl<T: const send> &RWARC<T> {
/// Duplicate a rwlock-protected ARC, as arc::clone.
fn clone() -> rw_arc<T> {
rw_arc { x: unsafe { clone_shared_mutable_state(&self.x) },
cant_nest: () }
fn clone() -> RWARC<T> {
RWARC { x: unsafe { clone_shared_mutable_state(&self.x) },
cant_nest: () }
}
/**
@ -277,7 +278,7 @@ impl<T: const send> &rw_arc<T> {
* # Failure
*
* Failing while inside the ARC will unlock the ARC while unwinding, so
* that other tasks won't block forever. As mutex_arc.access, it will also
* that other tasks won't block forever. As MutexARC.access, it will also
* poison the ARC, so subsequent readers and writers will both also fail.
*/
#[inline(always)]
@ -285,19 +286,19 @@ impl<T: const send> &rw_arc<T> {
let state = unsafe { get_shared_mutable_state(&self.x) };
do borrow_rwlock(state).write {
check_poison(false, state.failed);
let _z = poison_on_fail(&mut state.failed);
let _z = PoisonOnFail(&mut state.failed);
blk(&mut state.data)
}
}
/// As write(), but with a condvar, as sync::rwlock.write_cond().
#[inline(always)]
fn write_cond<U>(blk: fn(x: &x/mut T, c: &c/condvar) -> U) -> U {
fn write_cond<U>(blk: fn(x: &x/mut T, c: &c/Condvar) -> U) -> U {
let state = unsafe { get_shared_mutable_state(&self.x) };
do borrow_rwlock(state).write_cond |cond| {
check_poison(false, state.failed);
let _z = poison_on_fail(&mut state.failed);
let _z = PoisonOnFail(&mut state.failed);
blk(&mut state.data,
&condvar { is_mutex: false, failed: &mut state.failed,
&Condvar { is_mutex: false, failed: &mut state.failed,
cond: cond })
}
}
@ -320,9 +321,9 @@ impl<T: const send> &rw_arc<T> {
/**
* As write(), but with the ability to atomically 'downgrade' the lock.
* See sync::rwlock.write_downgrade(). The rw_write_mode token must be
* used to obtain the &mut T, and can be transformed into a rw_read_mode
* token by calling downgrade(), after which a &T can be obtained instead.
* See sync::rwlock.write_downgrade(). The RWWriteMode token must be used
* to obtain the &mut T, and can be transformed into a RWReadMode token by
* calling downgrade(), after which a &T can be obtained instead.
* ~~~
* do arc.write_downgrade |write_mode| {
* do (&write_mode).write_cond |state, condvar| {
@ -335,20 +336,20 @@ impl<T: const send> &rw_arc<T> {
* }
* ~~~
*/
fn write_downgrade<U>(blk: fn(+rw_write_mode<T>) -> U) -> U {
fn write_downgrade<U>(blk: fn(+RWWriteMode<T>) -> U) -> U {
let state = unsafe { get_shared_mutable_state(&self.x) };
do borrow_rwlock(state).write_downgrade |write_mode| {
check_poison(false, state.failed);
blk(rw_write_mode((&mut state.data, write_mode,
poison_on_fail(&mut state.failed))))
blk(RWWriteMode((&mut state.data, write_mode,
PoisonOnFail(&mut state.failed))))
}
}
/// To be called inside of the write_downgrade block.
fn downgrade(+token: rw_write_mode/&a<T>) -> rw_read_mode/&a<T> {
fn downgrade(+token: RWWriteMode/&a<T>) -> RWReadMode/&a<T> {
// The rwlock should assert that the token belongs to us for us.
let state = unsafe { get_shared_immutable_state(&self.x) };
let rw_write_mode((data, t, _poison)) = token;
let RWWriteMode((data, t, _poison)) = token;
// Let readers in
let new_token = (&state.lock).downgrade(t);
// Whatever region the input reference had, it will be safe to use
@ -358,7 +359,7 @@ impl<T: const send> &rw_arc<T> {
// Downgrade ensured the token belonged to us. Just a sanity check.
assert ptr::ref_eq(&state.data, new_data);
// Produce new token
rw_read_mode((new_data, new_token))
RWReadMode((new_data, new_token))
}
}
@ -370,12 +371,12 @@ impl<T: const send> &rw_arc<T> {
* in write mode.
*/
// FIXME(#2585) make this a by-move method on the arc
fn unwrap_rw_arc<T: const send>(+arc: rw_arc<T>) -> T {
let rw_arc { x: x, _ } = arc;
fn unwrap_rw_arc<T: const send>(+arc: RWARC<T>) -> T {
let RWARC { x: x, _ } = arc;
let inner = unsafe { unwrap_shared_mutable_state(x) };
let rw_arc_inner { failed: failed, data: data, _ } = inner;
let RWARCInner { failed: failed, data: data, _ } = inner;
if failed {
fail ~"Can't unwrap poisoned rw_arc - another task failed inside!"
fail ~"Can't unwrap poisoned RWARC - another task failed inside!"
}
data
}
@ -384,35 +385,35 @@ fn unwrap_rw_arc<T: const send>(+arc: rw_arc<T>) -> T {
// lock it. This wraps the unsafety, with the justification that the 'lock'
// field is never overwritten; only 'failed' and 'data'.
#[doc(hidden)]
fn borrow_rwlock<T: const send>(state: &r/mut rw_arc_inner<T>) -> &r/RWlock {
fn borrow_rwlock<T: const send>(state: &r/mut RWARCInner<T>) -> &r/RWlock {
unsafe { unsafe::transmute_immut(&mut state.lock) }
}
// FIXME (#3154) ice with struct/&<T> prevents these from being structs.
/// The "write permission" token used for rw_arc.write_downgrade().
enum rw_write_mode<T: const send> =
(&mut T, sync::RWlockWriteMode, poison_on_fail);
/// The "read permission" token used for rw_arc.write_downgrade().
enum rw_read_mode<T:const send> = (&T, sync::RWlockReadMode);
/// The "write permission" token used for RWARC.write_downgrade().
enum RWWriteMode<T: const send> =
(&mut T, sync::RWlockWriteMode, PoisonOnFail);
/// The "read permission" token used for RWARC.write_downgrade().
enum RWReadMode<T:const send> = (&T, sync::RWlockReadMode);
impl<T: const send> &rw_write_mode<T> {
/// Access the pre-downgrade rw_arc in write mode.
impl<T: const send> &RWWriteMode<T> {
/// Access the pre-downgrade RWARC in write mode.
fn write<U>(blk: fn(x: &mut T) -> U) -> U {
match *self {
rw_write_mode((data, ref token, _)) => {
RWWriteMode((data, ref token, _)) => {
do token.write {
blk(data)
}
}
}
}
/// Access the pre-downgrade rw_arc in write mode with a condvar.
fn write_cond<U>(blk: fn(x: &x/mut T, c: &c/condvar) -> U) -> U {
/// Access the pre-downgrade RWARC in write mode with a condvar.
fn write_cond<U>(blk: fn(x: &x/mut T, c: &c/Condvar) -> U) -> U {
match *self {
rw_write_mode((data, ref token, ref poison)) => {
RWWriteMode((data, ref token, ref poison)) => {
do token.write_cond |cond| {
let cvar = condvar {
let cvar = Condvar {
is_mutex: false, failed: poison.failed,
cond: cond };
blk(data, &cvar)
@ -422,11 +423,11 @@ impl<T: const send> &rw_write_mode<T> {
}
}
impl<T: const send> &rw_read_mode<T> {
impl<T: const send> &RWReadMode<T> {
/// Access the post-downgrade rwlock in read mode.
fn read<U>(blk: fn(x: &T) -> U) -> U {
match *self {
rw_read_mode((data, ref token)) => {
RWReadMode((data, ref token)) => {
do token.read { blk(data) }
}
}

1
src/libstd/std.rc
View File

@ -52,6 +52,7 @@ mod cell;
#[warn(non_camel_case_types)]
mod sync;
#[warn(non_camel_case_types)]
mod arc;
mod comm;