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Updated SDL 1.3 to the latest hg-5868:33245988e8a2 , video resize is not supported yet

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pelya
2011-12-05 19:46:32 +02:00
parent 2fe92bdcf9
commit aae35bbf37
678 changed files with 35446 additions and 77654 deletions
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366
project/jni/sdl-1.3/include/SDL_atomic.h
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@@ -1,41 +1,58 @@
/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2010 Sam Lantinga
Simple DirectMedia Layer
Copyright (C) 1997-2011 Sam Lantinga <slouken@libsdl.org>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
Contributed by Bob Pendleton, bob@pendleton.com
*/
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
/**
* \file SDL_atomic.h
*
* Atomic operations.
*
* These operations may, or may not, actually be implemented using
* processor specific atomic operations. When possible they are
* implemented as true processor specific atomic operations. When that
* is not possible the are implemented using locks that *do* use the
* available atomic operations.
*
* At the very minimum spin locks must be implemented. Without spin
* locks it is not possible (AFAICT) to emulate the rest of the atomic
* operations.
* \file SDL_atomic.h
*
* Atomic operations.
*
* IMPORTANT:
* If you are not an expert in concurrent lockless programming, you should
* only be using the atomic lock and reference counting functions in this
* file. In all other cases you should be protecting your data structures
* with full mutexes.
*
* The list of "safe" functions to use are:
* SDL_AtomicLock()
* SDL_AtomicUnlock()
* SDL_AtomicIncRef()
* SDL_AtomicDecRef()
*
* Seriously, here be dragons!
* ^^^^^^^^^^^^^^^^^^^^^^^^^^^
*
* You can find out a little more about lockless programming and the
* subtle issues that can arise here:
* http://msdn.microsoft.com/en-us/library/ee418650%28v=vs.85%29.aspx
*
* There's also lots of good information here:
* http://www.1024cores.net/home/lock-free-algorithms
*
* These operations may or may not actually be implemented using
* processor specific atomic operations. When possible they are
* implemented as true processor specific atomic operations. When that
* is not possible the are implemented using locks that *do* use the
* available atomic operations.
*
* All of the atomic operations that modify memory are full memory barriers.
*/
#ifndef _SDL_atomic_h_
@@ -46,6 +63,13 @@
#include "begin_code.h"
/* Need to do this here because intrin.h has C++ code in it */
/* Visual Studio 2005 has a bug where intrin.h conflicts with winnt.h */
#if defined(_MSC_VER) && (_MSC_VER >= 1500) && !defined(_WIN32_WCE)
#include <intrin.h>
#define HAVE_MSC_ATOMICS 1
#endif
/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
/* *INDENT-OFF* */
@@ -53,154 +77,232 @@ extern "C" {
/* *INDENT-ON* */
#endif
/* Function prototypes */
/**
* \name SDL AtomicLock
*
* The spin lock functions and type are required and can not be
* emulated because they are used in the emulation code.
* \name SDL AtomicLock
*
* The atomic locks are efficient spinlocks using CPU instructions,
* but are vulnerable to starvation and can spin forever if a thread
* holding a lock has been terminated. For this reason you should
* minimize the code executed inside an atomic lock and never do
* expensive things like API or system calls while holding them.
*
* The atomic locks are not safe to lock recursively.
*
* Porting Note:
* The spin lock functions and type are required and can not be
* emulated because they are used in the atomic emulation code.
*/
/*@{*/
typedef volatile Uint32 SDL_SpinLock;
typedef int SDL_SpinLock;
/**
* \brief Lock a spin lock by setting it to a none zero value.
*
* \param lock Points to the lock.
* \brief Try to lock a spin lock by setting it to a non-zero value.
*
* \param lock Points to the lock.
*
* \return SDL_TRUE if the lock succeeded, SDL_FALSE if the lock is already held.
*/
extern DECLSPEC SDL_bool SDLCALL SDL_AtomicTryLock(SDL_SpinLock *lock);
/**
* \brief Lock a spin lock by setting it to a non-zero value.
*
* \param lock Points to the lock.
*/
extern DECLSPEC void SDLCALL SDL_AtomicLock(SDL_SpinLock *lock);
/**
* \brief Unlock a spin lock by setting it to 0. Always returns immediately
* \brief Unlock a spin lock by setting it to 0. Always returns immediately
*
* \param lock Points to the lock.
* \param lock Points to the lock.
*/
extern DECLSPEC void SDLCALL SDL_AtomicUnlock(SDL_SpinLock *lock);
/*@}*//*SDL AtomicLock*/
/**
* \name 32 bit atomic operations
*/
/*@{*/
/**
* \brief Check to see if \c *ptr == 0 and set it to 1.
*
* \return SDL_True if the value pointed to by \c ptr was zero and
* SDL_False if it was not zero
*
* \param ptr Points to the value to be tested and set.
* The compiler barrier prevents the compiler from reordering
* reads and writes to globally visible variables across the call.
*/
extern DECLSPEC SDL_bool SDLCALL SDL_AtomicTestThenSet32(volatile Uint32 * ptr);
#ifdef _MSC_VER
void _ReadWriteBarrier(void);
#pragma intrinsic(_ReadWriteBarrier)
#define SDL_CompilerBarrier() _ReadWriteBarrier()
#elif defined(__GNUC__)
#define SDL_CompilerBarrier() __asm__ __volatile__ ("" : : : "memory")
#else
#define SDL_CompilerBarrier() \
({ SDL_SpinLock _tmp = 0; SDL_AtomicLock(&_tmp); SDL_AtomicUnlock(&_tmp); })
#endif
/* Platform specific optimized versions of the atomic functions,
* you can disable these by defining SDL_DISABLE_ATOMIC_INLINE
*/
#if defined(SDL_ATOMIC_DISABLED) && SDL_ATOMIC_DISABLED
#define SDL_DISABLE_ATOMIC_INLINE
#endif
#ifndef SDL_DISABLE_ATOMIC_INLINE
#ifdef HAVE_MSC_ATOMICS
#define SDL_AtomicSet(a, v) _InterlockedExchange((long*)&(a)->value, (v))
#define SDL_AtomicAdd(a, v) _InterlockedExchangeAdd((long*)&(a)->value, (v))
#define SDL_AtomicCAS(a, oldval, newval) (_InterlockedCompareExchange((long*)&(a)->value, (newval), (oldval)) == (oldval))
#define SDL_AtomicSetPtr(a, v) _InterlockedExchangePointer((a), (v))
#if _M_IX86
#define SDL_AtomicCASPtr(a, oldval, newval) (_InterlockedCompareExchange((long*)(a), (long)(newval), (long)(oldval)) == (long)(oldval))
#else
#define SDL_AtomicCASPtr(a, oldval, newval) (_InterlockedCompareExchangePointer((a), (newval), (oldval)) == (oldval))
#endif
#elif defined(__MACOSX__)
#include <libkern/OSAtomic.h>
#define SDL_AtomicCAS(a, oldval, newval) OSAtomicCompareAndSwap32Barrier((oldval), (newval), &(a)->value)
#if SIZEOF_VOIDP == 4
#define SDL_AtomicCASPtr(a, oldval, newval) OSAtomicCompareAndSwap32Barrier((int32_t)(oldval), (int32_t)(newval), (int32_t*)(a))
#elif SIZEOF_VOIDP == 8
#define SDL_AtomicCASPtr(a, oldval, newval) OSAtomicCompareAndSwap64Barrier((int64_t)(oldval), (int64_t)(newval), (int64_t*)(a))
#endif
#elif defined(HAVE_GCC_ATOMICS)
#define SDL_AtomicSet(a, v) __sync_lock_test_and_set(&(a)->value, v)
#define SDL_AtomicAdd(a, v) __sync_fetch_and_add(&(a)->value, v)
#define SDL_AtomicSetPtr(a, v) __sync_lock_test_and_set(a, v)
#define SDL_AtomicCAS(a, oldval, newval) __sync_bool_compare_and_swap(&(a)->value, oldval, newval)
#define SDL_AtomicCASPtr(a, oldval, newval) __sync_bool_compare_and_swap(a, oldval, newval)
#endif
#endif /* !SDL_DISABLE_ATOMIC_INLINE */
/**
* \brief Set the value pointed to by \c ptr to be zero.
*
* \param ptr Address of the value to be set to zero
* \brief A type representing an atomic integer value. It is a struct
* so people don't accidentally use numeric operations on it.
*/
extern DECLSPEC void SDLCALL SDL_AtomicClear32(volatile Uint32 * ptr);
#ifndef SDL_atomic_t_defined
typedef struct { int value; } SDL_atomic_t;
#endif
/**
* \brief Fetch the current value of \c *ptr and then increment that
* value in place.
*
* \return The value before it was incremented.
*
* \param ptr Address of the value to fetch and increment
*/
extern DECLSPEC Uint32 SDLCALL SDL_AtomicFetchThenIncrement32(volatile Uint32 * ptr);
* \brief Set an atomic variable to a new value if it is currently an old value.
*
* \return SDL_TRUE if the atomic variable was set, SDL_FALSE otherwise.
*
* \note If you don't know what this function is for, you shouldn't use it!
*/
#ifndef SDL_AtomicCAS
#define SDL_AtomicCAS SDL_AtomicCAS_
#endif
extern DECLSPEC SDL_bool SDLCALL SDL_AtomicCAS_(SDL_atomic_t *a, int oldval, int newval);
/**
* \brief Fetch \c *ptr and then decrement the value in place.
*
* \return The value before it was decremented.
*
* \param ptr Address of the value to fetch and decrement
* \brief Set an atomic variable to a value.
*
* \return The previous value of the atomic variable.
*/
extern DECLSPEC Uint32 SDLCALL SDL_AtomicFetchThenDecrement32(volatile Uint32 * ptr);
#ifndef SDL_AtomicSet
static __inline__ int SDL_AtomicSet(SDL_atomic_t *a, int v)
{
int value;
do {
value = a->value;
} while (!SDL_AtomicCAS(a, value, v));
return value;
}
#endif
/**
* \brief Fetch the current value at \c ptr and then add \c value to \c *ptr.
*
* \return \c *ptr before the addition took place.
*
* \param ptr The address of data we are changing.
* \param value The value to add to \c *ptr.
* \brief Get the value of an atomic variable
*/
extern DECLSPEC Uint32 SDLCALL SDL_AtomicFetchThenAdd32(volatile Uint32 * ptr, Uint32 value);
#ifndef SDL_AtomicGet
static __inline__ int SDL_AtomicGet(SDL_atomic_t *a)
{
int value = a->value;
SDL_CompilerBarrier();
return value;
}
#endif
/**
* \brief Fetch \c *ptr and then subtract \c value from it.
*
* \return \c *ptr before the subtraction took place.
*
* \param ptr The address of the data being changed.
* \param value The value to subtract from \c *ptr.
* \brief Add to an atomic variable.
*
* \return The previous value of the atomic variable.
*
* \note This same style can be used for any number operation
*/
extern DECLSPEC Uint32 SDLCALL SDL_AtomicFetchThenSubtract32(volatile Uint32 * ptr, Uint32 value);
#ifndef SDL_AtomicAdd
static __inline__ int SDL_AtomicAdd(SDL_atomic_t *a, int v)
{
int value;
do {
value = a->value;
} while (!SDL_AtomicCAS(a, value, (value + v)));
return value;
}
#endif
/**
* \brief Add one to the data pointed to by \c ptr and return that value.
*
* \return The incremented value.
*
* \param ptr The address of the data to increment.
* \brief Increment an atomic variable used as a reference count.
*/
extern DECLSPEC Uint32 SDLCALL SDL_AtomicIncrementThenFetch32(volatile Uint32 * ptr);
#ifndef SDL_AtomicIncRef
#define SDL_AtomicIncRef(a) SDL_AtomicAdd(a, 1)
#endif
/**
* \brief Subtract one from data pointed to by \c ptr and return the new value.
*
* \return The decremented value.
*
* \param ptr The address of the data to decrement.
* \brief Decrement an atomic variable used as a reference count.
*
* \return SDL_TRUE if the variable reached zero after decrementing,
* SDL_FALSE otherwise
*/
extern DECLSPEC Uint32 SDLCALL SDL_AtomicDecrementThenFetch32(volatile Uint32 * ptr);
#ifndef SDL_AtomicDecRef
#define SDL_AtomicDecRef(a) (SDL_AtomicAdd(a, -1) == 1)
#endif
/**
* \brief Add \c value to the data pointed to by \c ptr and return result.
*
* \return The sum of \c *ptr and \c value.
*
* \param ptr The address of the data to be modified.
* \param value The value to be added.
*/
extern DECLSPEC Uint32 SDLCALL SDL_AtomicAddThenFetch32(volatile Uint32 * ptr, Uint32 value);
* \brief Set a pointer to a new value if it is currently an old value.
*
* \return SDL_TRUE if the pointer was set, SDL_FALSE otherwise.
*
* \note If you don't know what this function is for, you shouldn't use it!
*/
#ifndef SDL_AtomicCASPtr
#define SDL_AtomicCASPtr SDL_AtomicCASPtr_
#endif
extern DECLSPEC SDL_bool SDLCALL SDL_AtomicCASPtr_(void* *a, void *oldval, void *newval);
/**
* \brief Subtract \c value from the data pointed to by \c ptr and return the result.
*
* \return The difference between \c *ptr and \c value.
*
* \param ptr The address of the data to be modified.
* \param value The value to be subtracted.
* \brief Set a pointer to a value atomically.
*
* \return The previous value of the pointer.
*/
extern DECLSPEC Uint32 SDLCALL SDL_AtomicSubtractThenFetch32(volatile Uint32 * ptr, Uint32 value);
/*@}*//*32 bit atomic operations*/
#ifndef SDL_AtomicSetPtr
static __inline__ void* SDL_AtomicSetPtr(void* *a, void* v)
{
void* value;
do {
value = *a;
} while (!SDL_AtomicCASPtr(a, value, v));
return value;
}
#endif
/**
* \name 64 bit atomic operations
* \brief Get the value of a pointer atomically.
*/
/*@{*/
#ifdef SDL_HAS_64BIT_TYPE
#ifndef SDL_AtomicGetPtr
static __inline__ void* SDL_AtomicGetPtr(void* *a)
{
void* value = *a;
SDL_CompilerBarrier();
return value;
}
#endif
extern DECLSPEC SDL_bool SDLCALL SDL_AtomicTestThenSet64(volatile Uint64 * ptr);
extern DECLSPEC void SDLCALL SDL_AtomicClear64(volatile Uint64 * ptr);
extern DECLSPEC Uint64 SDLCALL SDL_AtomicFetchThenIncrement64(volatile Uint64 * ptr);
extern DECLSPEC Uint64 SDLCALL SDL_AtomicFetchThenDecrement64(volatile Uint64 * ptr);
extern DECLSPEC Uint64 SDLCALL SDL_AtomicFetchThenAdd64(volatile Uint64 * ptr, Uint64 value);
extern DECLSPEC Uint64 SDLCALL SDL_AtomicFetchThenSubtract64(volatile Uint64 * ptr, Uint64 value);
extern DECLSPEC Uint64 SDLCALL SDL_AtomicIncrementThenFetch64(volatile Uint64 * ptr);
extern DECLSPEC Uint64 SDLCALL SDL_AtomicDecrementThenFetch64(volatile Uint64 * ptr);
extern DECLSPEC Uint64 SDLCALL SDL_AtomicAddThenFetch64(volatile Uint64 * ptr, Uint64 value);
extern DECLSPEC Uint64 SDLCALL SDL_AtomicSubtractThenFetch64(volatile Uint64 * ptr, Uint64 value);
#endif /* SDL_HAS_64BIT_TYPE */
/*@}*//*64 bit atomic operations*/
/* Ends C function definitions when using C++ */
#ifdef __cplusplus