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Reduce custom code

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Signed-off-by: falkTX <falktx@falktx.com>
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falkTX 2022-12-30 16:02:53 +00:00
parent ebaa70b05a
commit 476bae222f
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3 changed files with 7 additions and 355 deletions
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238
src/extra/ScopedLock.hpp
View file

@ -1,238 +0,0 @@
/*
==============================================================================
This file is part of the Water library.
Copyright (c) 2016 ROLI Ltd.
Copyright (C) 2017 Filipe Coelho <falktx@falktx.com>
Permission is granted to use this software under the terms of the ISC license
http://www.isc.org/downloads/software-support-policy/isc-license/
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH REGARD
TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT,
OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
OF THIS SOFTWARE.
==============================================================================
*/
#ifndef WATER_SCOPEDLOCK_HPP_INCLUDED
#define WATER_SCOPEDLOCK_HPP_INCLUDED
#include "DistrhoUtils.hpp"
START_NAMESPACE_DISTRHO
//==============================================================================
/**
Automatically locks and unlocks a mutex object.
Use one of these as a local variable to provide RAII-based locking of a mutex.
The templated class could be a CriticalSection, SpinLock, or anything else that
provides enter() and exit() methods.
e.g. @code
CriticalSection myCriticalSection;
for (;;)
{
const GenericScopedLock<CriticalSection> myScopedLock (myCriticalSection);
// myCriticalSection is now locked
...do some stuff...
// myCriticalSection gets unlocked here.
}
@endcode
@see GenericScopedUnlock, CriticalSection, SpinLock, ScopedLock, ScopedUnlock
*/
template <class LockType>
class GenericScopedLock
{
public:
//==============================================================================
/** Creates a GenericScopedLock.
As soon as it is created, this will acquire the lock, and when the GenericScopedLock
object is deleted, the lock will be released.
Make sure this object is created and deleted by the same thread,
otherwise there are no guarantees what will happen! Best just to use it
as a local stack object, rather than creating one with the new() operator.
*/
inline explicit GenericScopedLock (const LockType& lock) noexcept : lock_ (lock) { lock.enter(); }
/** Destructor.
The lock will be released when the destructor is called.
Make sure this object is created and deleted by the same thread, otherwise there are
no guarantees what will happen!
*/
inline ~GenericScopedLock() noexcept { lock_.exit(); }
private:
//==============================================================================
const LockType& lock_;
DISTRHO_DECLARE_NON_COPYABLE (GenericScopedLock)
};
//==============================================================================
/**
Automatically unlocks and re-locks a mutex object.
This is the reverse of a GenericScopedLock object - instead of locking the mutex
for the lifetime of this object, it unlocks it.
Make sure you don't try to unlock mutexes that aren't actually locked!
e.g. @code
CriticalSection myCriticalSection;
for (;;)
{
const GenericScopedLock<CriticalSection> myScopedLock (myCriticalSection);
// myCriticalSection is now locked
... do some stuff with it locked ..
while (xyz)
{
... do some stuff with it locked ..
const GenericScopedUnlock<CriticalSection> unlocker (myCriticalSection);
// myCriticalSection is now unlocked for the remainder of this block,
// and re-locked at the end.
...do some stuff with it unlocked ...
}
// myCriticalSection gets unlocked here.
}
@endcode
@see GenericScopedLock, CriticalSection, ScopedLock, ScopedUnlock
*/
template <class LockType>
class GenericScopedUnlock
{
public:
//==============================================================================
/** Creates a GenericScopedUnlock.
As soon as it is created, this will unlock the CriticalSection, and
when the ScopedLock object is deleted, the CriticalSection will
be re-locked.
Make sure this object is created and deleted by the same thread,
otherwise there are no guarantees what will happen! Best just to use it
as a local stack object, rather than creating one with the new() operator.
*/
inline explicit GenericScopedUnlock (const LockType& lock) noexcept : lock_ (lock) { lock.exit(); }
/** Destructor.
The CriticalSection will be unlocked when the destructor is called.
Make sure this object is created and deleted by the same thread,
otherwise there are no guarantees what will happen!
*/
inline ~GenericScopedUnlock() noexcept { lock_.enter(); }
private:
//==============================================================================
const LockType& lock_;
DISTRHO_DECLARE_NON_COPYABLE (GenericScopedUnlock)
};
//==============================================================================
/**
Automatically locks and unlocks a mutex object.
Use one of these as a local variable to provide RAII-based locking of a mutex.
The templated class could be a CriticalSection, SpinLock, or anything else that
provides enter() and exit() methods.
e.g. @code
CriticalSection myCriticalSection;
for (;;)
{
const GenericScopedTryLock<CriticalSection> myScopedTryLock (myCriticalSection);
// Unlike using a ScopedLock, this may fail to actually get the lock, so you
// should test this with the isLocked() method before doing your thread-unsafe
// action..
if (myScopedTryLock.isLocked())
{
...do some stuff...
}
else
{
..our attempt at locking failed because another thread had already locked it..
}
// myCriticalSection gets unlocked here (if it was locked)
}
@endcode
@see CriticalSection::tryEnter, GenericScopedLock, GenericScopedUnlock
*/
template <class LockType>
class GenericScopedTryLock
{
public:
//==============================================================================
/** Creates a GenericScopedTryLock.
As soon as it is created, this will attempt to acquire the lock, and when the
GenericScopedTryLock is deleted, the lock will be released (if the lock was
successfully acquired).
Make sure this object is created and deleted by the same thread,
otherwise there are no guarantees what will happen! Best just to use it
as a local stack object, rather than creating one with the new() operator.
*/
inline explicit GenericScopedTryLock (const LockType& lock) noexcept
: lock_ (lock), lockWasSuccessful (lock.tryEnter()) {}
/** Destructor.
The mutex will be unlocked (if it had been successfully locked) when the
destructor is called.
Make sure this object is created and deleted by the same thread,
otherwise there are no guarantees what will happen!
*/
inline ~GenericScopedTryLock() noexcept { if (lockWasSuccessful) lock_.exit(); }
/** Returns true if the mutex was successfully locked. */
bool isLocked() const noexcept { return lockWasSuccessful; }
private:
//==============================================================================
const LockType& lock_;
const bool lockWasSuccessful;
DISTRHO_DECLARE_NON_COPYABLE (GenericScopedTryLock)
};
END_NAMESPACE_DISTRHO
#endif // WATER_SCOPEDLOCK_HPP_INCLUDED

14
src/extra/SharedResourcePointer.hpp
View file

@ -3,7 +3,7 @@
This file is part of the Water library.
Copyright (c) 2016 ROLI Ltd.
Copyright (C) 2017-2019 Filipe Coelho <falktx@falktx.com>
Copyright (C) 2017-2022 Filipe Coelho <falktx@falktx.com>
Permission is granted to use this software under the terms of the ISC license
http://www.isc.org/downloads/software-support-policy/isc-license/
@ -27,7 +27,7 @@
#define WATER_SHAREDRESOURCEPOINTER_HPP_INCLUDED
#include "ReferenceCountedObject.hpp"
#include "SpinLock.hpp"
#include "extra/Mutex.hpp"
#include "extra/ScopedPointer.hpp"
START_NAMESPACE_DISTRHO
@ -127,7 +127,7 @@ public:
~SharedResourcePointer()
{
SharedObjectHolder& holder = getSharedObjectHolder();
const SpinLock::ScopedLockType sl (holder.lock);
const MutexLocker cml (holder.lock);
if (--(holder.refCount) == 0)
holder.sharedInstance = nullptr;
@ -150,7 +150,7 @@ public:
private:
struct SharedObjectHolder : public ReferenceCountedObject
{
SpinLock lock;
Mutex lock;
ScopedPointer<SharedObjectType> sharedInstance;
int refCount;
};
@ -166,7 +166,7 @@ private:
void initialise()
{
SharedObjectHolder& holder = getSharedObjectHolder();
const SpinLock::ScopedLockType sl (holder.lock);
const MutexLocker cml (holder.lock);
if (++(holder.refCount) == 1)
holder.sharedInstance = new SharedObjectType();
@ -178,7 +178,7 @@ private:
void initialise_variant(const T* const variant)
{
SharedObjectHolder& holder = getSharedObjectHolder();
const SpinLock::ScopedLockType sl (holder.lock);
const MutexLocker cml (holder.lock);
if (++(holder.refCount) == 1)
holder.sharedInstance = new SharedObjectType(variant);
@ -190,7 +190,7 @@ private:
void initialise_variant2(const T1* const v1, const T2* const v2)
{
SharedObjectHolder& holder = getSharedObjectHolder();
const SpinLock::ScopedLockType sl (holder.lock);
const MutexLocker cml (holder.lock);
if (++(holder.refCount) == 1)
holder.sharedInstance = new SharedObjectType(v1, v2);

110
src/extra/SpinLock.hpp
View file

@ -1,110 +0,0 @@
/*
==============================================================================
This file is part of the Water library.
Copyright (c) 2016 ROLI Ltd.
Copyright (C) 2017 Filipe Coelho <falktx@falktx.com>
Permission is granted to use this software under the terms of the ISC license
http://www.isc.org/downloads/software-support-policy/isc-license/
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH REGARD
TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT,
OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
OF THIS SOFTWARE.
==============================================================================
*/
#ifndef WATER_SPINLOCK_HPP_INCLUDED
#define WATER_SPINLOCK_HPP_INCLUDED
#include "Atomic.hpp"
#include "ScopedLock.hpp"
START_NAMESPACE_DISTRHO
//==============================================================================
/**
A simple spin-lock class that can be used as a simple, low-overhead mutex for
uncontended situations.
Note that unlike a CriticalSection, this type of lock is not re-entrant, and may
be less efficient when used it a highly contended situation, but it's very small and
requires almost no initialisation.
It's most appropriate for simple situations where you're only going to hold the
lock for a very brief time.
@see CriticalSection
*/
class SpinLock
{
public:
inline SpinLock() noexcept : lock() {}
inline ~SpinLock() noexcept {}
/** Acquires the lock.
This will block until the lock has been successfully acquired by this thread.
Note that a SpinLock is NOT re-entrant, and is not smart enough to know whether the
caller thread already has the lock - so if a thread tries to acquire a lock that it
already holds, this method will never return!
It's strongly recommended that you never call this method directly - instead use the
ScopedLockType class to manage the locking using an RAII pattern instead.
*/
void enter() const noexcept
{
if (! tryEnter())
{
for (int i = 20; --i >= 0;)
if (tryEnter())
return;
while (! tryEnter())
{
#ifdef DISTRHO_OS_WINDOWS
Sleep (0);
#else
sched_yield();
#endif
}
}
}
/** Attempts to acquire the lock, returning true if this was successful. */
inline bool tryEnter() const noexcept
{
return lock.compareAndSetBool (1, 0);
}
/** Releases the lock. */
inline void exit() const noexcept
{
DISTRHO_SAFE_ASSERT_RETURN (lock.get() == 1,);
lock = 0;
}
//==============================================================================
/** Provides the type of scoped lock to use for locking a SpinLock. */
typedef GenericScopedLock <SpinLock> ScopedLockType;
/** Provides the type of scoped unlocker to use with a SpinLock. */
typedef GenericScopedUnlock <SpinLock> ScopedUnlockType;
private:
//==============================================================================
mutable Atomic<int> lock;
DISTRHO_DECLARE_NON_COPYABLE (SpinLock)
};
END_NAMESPACE_DISTRHO
#endif // WATER_SPINLOCK_HPP_INCLUDED