Green-Sky/tomato
1
0
Fork 1
Code Issues Pull Requests 1 Actions Packages Projects Releases 1 Wiki Activity

Merge commit 'dec0d4ec4153bf9fc2b78ae6c2df45b6ea8dde7a' as 'external/sdl/SDL'

Browse Source
This commit is contained in:
Green Sky
2023-07-25 22:27:55 +02:00
parent b38ea75e56 dec0d4ec41
commit b8e444eaa8
1663 changed files with 627495 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

301
external/sdl/SDL/src/atomic/SDL_atomic.c vendored Normal file
View File

@ -0,0 +1,301 @@
/*
Simple DirectMedia Layer
Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
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.
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:
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.
*/
#include "SDL_internal.h"
#if defined(_MSC_VER) && (_MSC_VER >= 1900)
#include <intrin.h>
#define HAVE_MSC_ATOMICS 1
#endif
#ifdef __MACOS__ /* !!! FIXME: should we favor gcc atomics? */
#include <libkern/OSAtomic.h>
#endif
#if !defined(HAVE_GCC_ATOMICS) && defined(__SOLARIS__)
#include <atomic.h>
#endif
/* The __atomic_load_n() intrinsic showed up in different times for different compilers. */
#ifdef __clang__
#if __has_builtin(__atomic_load_n) || defined(HAVE_GCC_ATOMICS)
/* !!! FIXME: this advertises as available in the NDK but uses an external symbol we don't have.
It might be in a later NDK or we might need an extra library? --ryan. */
#ifndef __ANDROID__
#define HAVE_ATOMIC_LOAD_N 1
#endif
#endif
#elif defined(__GNUC__)
#if (__GNUC__ >= 5)
#define HAVE_ATOMIC_LOAD_N 1
#endif
#endif
/* *INDENT-OFF* */ /* clang-format off */
#if defined(__WATCOMC__) && defined(__386__)
SDL_COMPILE_TIME_ASSERT(intsize, 4==sizeof(int));
#define HAVE_WATCOM_ATOMICS
extern __inline int _SDL_xchg_watcom(volatile int *a, int v);
#pragma aux _SDL_xchg_watcom = \
"lock xchg [ecx], eax" \
parm [ecx] [eax] \
value [eax] \
modify exact [eax];
extern __inline unsigned char _SDL_cmpxchg_watcom(volatile int *a, int newval, int oldval);
#pragma aux _SDL_cmpxchg_watcom = \
"lock cmpxchg [edx], ecx" \
"setz al" \
parm [edx] [ecx] [eax] \
value [al] \
modify exact [eax];
extern __inline int _SDL_xadd_watcom(volatile int *a, int v);
#pragma aux _SDL_xadd_watcom = \
"lock xadd [ecx], eax" \
parm [ecx] [eax] \
value [eax] \
modify exact [eax];
#endif /* __WATCOMC__ && __386__ */
/* *INDENT-ON* */ /* clang-format on */
/*
If any of the operations are not provided then we must emulate some
of them. That means we need a nice implementation of spin locks
that avoids the "one big lock" problem. We use a vector of spin
locks and pick which one to use based on the address of the operand
of the function.
To generate the index of the lock we first shift by 3 bits to get
rid on the zero bits that result from 32 and 64 bit alignment of
data. We then mask off all but 5 bits and use those 5 bits as an
index into the table.
Picking the lock this way insures that accesses to the same data at
the same time will go to the same lock. OTOH, accesses to different
data have only a 1/32 chance of hitting the same lock. That should
pretty much eliminate the chances of several atomic operations on
different data from waiting on the same "big lock". If it isn't
then the table of locks can be expanded to a new size so long as
the new size is a power of two.
Contributed by Bob Pendleton, bob@pendleton.com
*/
#if !defined(HAVE_MSC_ATOMICS) && !defined(HAVE_GCC_ATOMICS) && !defined(__MACOS__) && !defined(__SOLARIS__) && !defined(HAVE_WATCOM_ATOMICS)
#define EMULATE_CAS 1
#endif
#ifdef EMULATE_CAS
static SDL_SpinLock locks[32];
static SDL_INLINE void enterLock(void *a)
{
uintptr_t index = ((((uintptr_t)a) >> 3) & 0x1f);
SDL_AtomicLock(&locks[index]);
}
static SDL_INLINE void leaveLock(void *a)
{
uintptr_t index = ((((uintptr_t)a) >> 3) & 0x1f);
SDL_AtomicUnlock(&locks[index]);
}
#endif
SDL_bool SDL_AtomicCAS(SDL_AtomicInt *a, int oldval, int newval)
{
#ifdef HAVE_MSC_ATOMICS
SDL_COMPILE_TIME_ASSERT(atomic_cas, sizeof(long) == sizeof(a->value));
return _InterlockedCompareExchange((long *)&a->value, (long)newval, (long)oldval) == (long)oldval;
#elif defined(HAVE_WATCOM_ATOMICS)
return (SDL_bool)_SDL_cmpxchg_watcom(&a->value, newval, oldval);
#elif defined(HAVE_GCC_ATOMICS)
return (SDL_bool)__sync_bool_compare_and_swap(&a->value, oldval, newval);
#elif defined(__MACOS__) /* this is deprecated in 10.12 sdk; favor gcc atomics. */
return (SDL_bool)OSAtomicCompareAndSwap32Barrier(oldval, newval, &a->value);
#elif defined(__SOLARIS__)
return (SDL_bool)((int)atomic_cas_uint((volatile uint_t *)&a->value, (uint_t)oldval, (uint_t)newval) == oldval);
#elif defined(EMULATE_CAS)
SDL_bool retval = SDL_FALSE;
enterLock(a);
if (a->value == oldval) {
a->value = newval;
retval = SDL_TRUE;
}
leaveLock(a);
return retval;
#else
#error Please define your platform.
#endif
}
SDL_bool SDL_AtomicCASPtr(void **a, void *oldval, void *newval)
{
#ifdef HAVE_MSC_ATOMICS
return _InterlockedCompareExchangePointer(a, newval, oldval) == oldval;
#elif defined(HAVE_WATCOM_ATOMICS)
return (SDL_bool)_SDL_cmpxchg_watcom((int *)a, (long)newval, (long)oldval);
#elif defined(HAVE_GCC_ATOMICS)
return __sync_bool_compare_and_swap(a, oldval, newval);
#elif defined(__MACOS__) && defined(__LP64__) /* this is deprecated in 10.12 sdk; favor gcc atomics. */
return (SDL_bool)OSAtomicCompareAndSwap64Barrier((int64_t)oldval, (int64_t)newval, (int64_t *)a);
#elif defined(__MACOS__) && !defined(__LP64__) /* this is deprecated in 10.12 sdk; favor gcc atomics. */
return (SDL_bool)OSAtomicCompareAndSwap32Barrier((int32_t)oldval, (int32_t)newval, (int32_t *)a);
#elif defined(__SOLARIS__)
return (SDL_bool)(atomic_cas_ptr(a, oldval, newval) == oldval);
#elif defined(EMULATE_CAS)
SDL_bool retval = SDL_FALSE;
enterLock(a);
if (*a == oldval) {
*a = newval;
retval = SDL_TRUE;
}
leaveLock(a);
return retval;
#else
#error Please define your platform.
#endif
}
int SDL_AtomicSet(SDL_AtomicInt *a, int v)
{
#ifdef HAVE_MSC_ATOMICS
SDL_COMPILE_TIME_ASSERT(atomic_set, sizeof(long) == sizeof(a->value));
return _InterlockedExchange((long *)&a->value, v);
#elif defined(HAVE_WATCOM_ATOMICS)
return _SDL_xchg_watcom(&a->value, v);
#elif defined(HAVE_GCC_ATOMICS)
return __sync_lock_test_and_set(&a->value, v);
#elif defined(__SOLARIS__)
return (int)atomic_swap_uint((volatile uint_t *)&a->value, v);
#else
int value;
do {
value = a->value;
} while (!SDL_AtomicCAS(a, value, v));
return value;
#endif
}
void *SDL_AtomicSetPtr(void **a, void *v)
{
#ifdef HAVE_MSC_ATOMICS
return _InterlockedExchangePointer(a, v);
#elif defined(HAVE_WATCOM_ATOMICS)
return (void *)_SDL_xchg_watcom((int *)a, (long)v);
#elif defined(HAVE_GCC_ATOMICS)
return __sync_lock_test_and_set(a, v);
#elif defined(__SOLARIS__)
return atomic_swap_ptr(a, v);
#else
void *value;
do {
value = *a;
} while (!SDL_AtomicCASPtr(a, value, v));
return value;
#endif
}
int SDL_AtomicAdd(SDL_AtomicInt *a, int v)
{
#ifdef HAVE_MSC_ATOMICS
SDL_COMPILE_TIME_ASSERT(atomic_add, sizeof(long) == sizeof(a->value));
return _InterlockedExchangeAdd((long *)&a->value, v);
#elif defined(HAVE_WATCOM_ATOMICS)
return _SDL_xadd_watcom(&a->value, v);
#elif defined(HAVE_GCC_ATOMICS)
return __sync_fetch_and_add(&a->value, v);
#elif defined(__SOLARIS__)
int pv = a->value;
membar_consumer();
atomic_add_int((volatile uint_t *)&a->value, v);
return pv;
#else
int value;
do {
value = a->value;
} while (!SDL_AtomicCAS(a, value, (value + v)));
return value;
#endif
}
int SDL_AtomicGet(SDL_AtomicInt *a)
{
#ifdef HAVE_ATOMIC_LOAD_N
return __atomic_load_n(&a->value, __ATOMIC_SEQ_CST);
#elif defined(HAVE_MSC_ATOMICS)
SDL_COMPILE_TIME_ASSERT(atomic_get, sizeof(long) == sizeof(a->value));
return _InterlockedOr((long *)&a->value, 0);
#elif defined(HAVE_WATCOM_ATOMICS)
return _SDL_xadd_watcom(&a->value, 0);
#elif defined(HAVE_GCC_ATOMICS)
return __sync_or_and_fetch(&a->value, 0);
#elif defined(__MACOS__) /* this is deprecated in 10.12 sdk; favor gcc atomics. */
return sizeof(a->value) == sizeof(uint32_t) ? OSAtomicOr32Barrier(0, (volatile uint32_t *)&a->value) : OSAtomicAdd64Barrier(0, (volatile int64_t *)&a->value);
#elif defined(__SOLARIS__)
return atomic_or_uint((volatile uint_t *)&a->value, 0);
#else
int value;
do {
value = a->value;
} while (!SDL_AtomicCAS(a, value, value));
return value;
#endif
}
void *SDL_AtomicGetPtr(void **a)
{
#ifdef HAVE_ATOMIC_LOAD_N
return __atomic_load_n(a, __ATOMIC_SEQ_CST);
#elif defined(HAVE_MSC_ATOMICS)
return _InterlockedCompareExchangePointer(a, NULL, NULL);
#elif defined(HAVE_GCC_ATOMICS)
return __sync_val_compare_and_swap(a, (void *)0, (void *)0);
#elif defined(__SOLARIS__)
return atomic_cas_ptr(a, (void *)0, (void *)0);
#else
void *value;
do {
value = *a;
} while (!SDL_AtomicCASPtr(a, value, value));
return value;
#endif
}
#ifdef SDL_MEMORY_BARRIER_USES_FUNCTION
#error This file should be built in arm mode so the mcr instruction is available for memory barriers
#endif
void SDL_MemoryBarrierReleaseFunction(void)
{
SDL_MemoryBarrierRelease();
}
void SDL_MemoryBarrierAcquireFunction(void)
{
SDL_MemoryBarrierAcquire();
}

207
external/sdl/SDL/src/atomic/SDL_spinlock.c vendored Normal file
View File

@ -0,0 +1,207 @@
/*
Simple DirectMedia Layer
Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
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.
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:
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.
*/
#include "SDL_internal.h"
#if defined(__WIN32__) || defined(__WINRT__) || defined(__GDK__)
#include "../core/windows/SDL_windows.h"
#endif
#if !defined(HAVE_GCC_ATOMICS) && defined(__SOLARIS__)
#include <atomic.h>
#endif
#if !defined(HAVE_GCC_ATOMICS) && defined(__RISCOS__)
#include <unixlib/local.h>
#endif
#if defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64))
#include <xmmintrin.h>
#endif
#ifdef PS2
#include <kernel.h>
#endif
#if !defined(HAVE_GCC_ATOMICS) && defined(__MACOS__)
#include <libkern/OSAtomic.h>
#endif
/* *INDENT-OFF* */ /* clang-format off */
#if defined(__WATCOMC__) && defined(__386__)
SDL_COMPILE_TIME_ASSERT(locksize, 4==sizeof(SDL_SpinLock));
extern __inline int _SDL_xchg_watcom(volatile int *a, int v);
#pragma aux _SDL_xchg_watcom = \
"lock xchg [ecx], eax" \
parm [ecx] [eax] \
value [eax] \
modify exact [eax];
#endif /* __WATCOMC__ && __386__ */
/* *INDENT-ON* */ /* clang-format on */
/* This function is where all the magic happens... */
SDL_bool SDL_AtomicTryLock(SDL_SpinLock *lock)
{
#ifdef SDL_ATOMIC_DISABLED
/* Terrible terrible damage */
static SDL_Mutex *_spinlock_mutex;
if (_spinlock_mutex == NULL) {
/* Race condition on first lock... */
_spinlock_mutex = SDL_CreateMutex();
}
SDL_LockMutex(_spinlock_mutex);
if (*lock == 0) {
*lock = 1;
SDL_UnlockMutex(_spinlock_mutex);
return SDL_TRUE;
} else {
SDL_UnlockMutex(_spinlock_mutex);
return SDL_FALSE;
}
#elif defined(HAVE_GCC_ATOMICS) || defined(HAVE_GCC_SYNC_LOCK_TEST_AND_SET)
return __sync_lock_test_and_set(lock, 1) == 0;
#elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_ARM64))
return _InterlockedExchange_acq(lock, 1) == 0;
#elif defined(_MSC_VER)
SDL_COMPILE_TIME_ASSERT(locksize, sizeof(*lock) == sizeof(long));
return InterlockedExchange((long *)lock, 1) == 0;
#elif defined(__WATCOMC__) && defined(__386__)
return _SDL_xchg_watcom(lock, 1) == 0;
#elif defined(__GNUC__) && defined(__arm__) && \
(defined(__ARM_ARCH_3__) || defined(__ARM_ARCH_3M__) || \
defined(__ARM_ARCH_4__) || defined(__ARM_ARCH_4T__) || \
defined(__ARM_ARCH_5__) || defined(__ARM_ARCH_5TE__) || \
defined(__ARM_ARCH_5TEJ__))
int result;
#ifdef __RISCOS__
if (__cpucap_have_rex()) {
__asm__ __volatile__(
"ldrex %0, [%2]\nteq %0, #0\nstrexeq %0, %1, [%2]"
: "=&r"(result)
: "r"(1), "r"(lock)
: "cc", "memory");
return result == 0;
}
#endif
__asm__ __volatile__(
"swp %0, %1, [%2]\n"
: "=&r,&r"(result)
: "r,0"(1), "r,r"(lock)
: "memory");
return result == 0;
#elif defined(__GNUC__) && defined(__arm__)
int result;
__asm__ __volatile__(
"ldrex %0, [%2]\nteq %0, #0\nstrexeq %0, %1, [%2]"
: "=&r"(result)
: "r"(1), "r"(lock)
: "cc", "memory");
return result == 0;
#elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
int result;
__asm__ __volatile__(
"lock ; xchgl %0, (%1)\n"
: "=r"(result)
: "r"(lock), "0"(1)
: "cc", "memory");
return result == 0;
#elif defined(__MACOS__) || defined(__IOS__) || defined(__TVOS__)
/* Maybe used for PowerPC, but the Intel asm or gcc atomics are favored. */
return OSAtomicCompareAndSwap32Barrier(0, 1, lock);
#elif defined(__SOLARIS__) && defined(_LP64)
/* Used for Solaris with non-gcc compilers. */
return (SDL_bool)((int)atomic_cas_64((volatile uint64_t *)lock, 0, 1) == 0);
#elif defined(__SOLARIS__) && !defined(_LP64)
/* Used for Solaris with non-gcc compilers. */
return (SDL_bool)((int)atomic_cas_32((volatile uint32_t *)lock, 0, 1) == 0);
#elif defined(PS2)
uint32_t oldintr;
SDL_bool res = SDL_FALSE;
// disable interuption
oldintr = DIntr();
if (*lock == 0) {
*lock = 1;
res = SDL_TRUE;
}
// enable interuption
if (oldintr) {
EIntr();
}
return res;
#else
#error Please implement for your platform.
return SDL_FALSE;
#endif
}
void SDL_AtomicLock(SDL_SpinLock *lock)
{
int iterations = 0;
/* FIXME: Should we have an eventual timeout? */
while (!SDL_AtomicTryLock(lock)) {
if (iterations < 32) {
iterations++;
SDL_CPUPauseInstruction();
} else {
/* !!! FIXME: this doesn't definitely give up the current timeslice, it does different things on various platforms. */
SDL_Delay(0);
}
}
}
void SDL_AtomicUnlock(SDL_SpinLock *lock)
{
#if defined(HAVE_GCC_ATOMICS) || defined(HAVE_GCC_SYNC_LOCK_TEST_AND_SET)
__sync_lock_release(lock);
#elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_ARM64))
_InterlockedExchange_rel(lock, 0);
#elif defined(_MSC_VER)
_ReadWriteBarrier();
*lock = 0;
#elif defined(__WATCOMC__) && defined(__386__)
SDL_CompilerBarrier();
*lock = 0;
#elif defined(__SOLARIS__)
/* Used for Solaris when not using gcc. */
*lock = 0;
membar_producer();
#else
*lock = 0;
#endif
}