hdkv/yuzu
1
Fork 0
Code Issues Pull Requests Releases 1 Activity

early-access version 1611

Browse Source
This commit is contained in:
pineappleEA
2021-04-18 05:35:25 +02:00
parent 16f54e367d
commit 18db69f039
1409 changed files with 545335 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

308
externals/SDL/src/atomic/SDL_atomic.c vendored Executable file
View File

@@ -0,0 +1,308 @@
/*
Simple DirectMedia Layer
Copyright (C) 1997-2020 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"
#include "SDL_atomic.h"
#if defined(_MSC_VER) && (_MSC_VER >= 1500)
#include <intrin.h>
#define HAVE_MSC_ATOMICS 1
#endif
#if defined(__MACOSX__) /* !!! 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. */
#if defined(HAVE_GCC_ATOMICS)
# if defined(__clang__)
# if __has_builtin(__atomic_load_n)
/* !!! 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. */
# if !defined(__ANDROID__)
# define HAVE_ATOMIC_LOAD_N 1
# endif
# endif
# elif defined(__GNUC__)
# if (__GNUC__ >= 5)
# define HAVE_ATOMIC_LOAD_N 1
# endif
# endif
#endif
#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__ */
/*
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 allignment 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(__MACOSX__) && !defined(__SOLARIS__) && !defined(HAVE_WATCOM_ATOMICS)
#define EMULATE_CAS 1
#endif
#if 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_atomic_t *a, int oldval, int newval)
{
#ifdef HAVE_MSC_ATOMICS
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(__MACOSX__) /* this is deprecated in 10.12 sdk; favor gcc atomics. */
return (SDL_bool) OSAtomicCompareAndSwap32Barrier(oldval, newval, &a->value);
#elif defined(__SOLARIS__) && defined(_LP64)
return (SDL_bool) ((int) atomic_cas_64((volatile uint64_t*)&a->value, (uint64_t)oldval, (uint64_t)newval) == oldval);
#elif defined(__SOLARIS__) && !defined(_LP64)
return (SDL_bool) ((int) atomic_cas_32((volatile uint32_t*)&a->value, (uint32_t)oldval, (uint32_t)newval) == oldval);
#elif 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)
{
#if defined(HAVE_MSC_ATOMICS) && (_M_IX86)
return (_InterlockedCompareExchange((long*)a, (long)newval, (long)oldval) == (long)oldval);
#elif defined(HAVE_MSC_ATOMICS) && (!_M_IX86)
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(__MACOSX__) && 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(__MACOSX__) && !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 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_atomic_t *a, int v)
{
#ifdef HAVE_MSC_ATOMICS
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__) && defined(_LP64)
return (int) atomic_swap_64((volatile uint64_t*)&a->value, (uint64_t)v);
#elif defined(__SOLARIS__) && !defined(_LP64)
return (int) atomic_swap_32((volatile uint32_t*)&a->value, (uint32_t)v);
#else
int value;
do {
value = a->value;
} while (!SDL_AtomicCAS(a, value, v));
return value;
#endif
}
void*
SDL_AtomicSetPtr(void **a, void *v)
{
#if defined(HAVE_MSC_ATOMICS) && (_M_IX86)
return (void *) _InterlockedExchange((long *)a, (long) v);
#elif defined(HAVE_MSC_ATOMICS) && (!_M_IX86)
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_atomic_t *a, int v)
{
#ifdef HAVE_MSC_ATOMICS
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();
#if defined(_LP64)
atomic_add_64((volatile uint64_t*)&a->value, v);
#elif !defined(_LP64)
atomic_add_32((volatile uint32_t*)&a->value, v);
#endif
return pv;
#else
int value;
do {
value = a->value;
} while (!SDL_AtomicCAS(a, value, (value + v)));
return value;
#endif
}
int
SDL_AtomicGet(SDL_atomic_t *a)
{
#ifdef HAVE_ATOMIC_LOAD_N
return __atomic_load_n(&a->value, __ATOMIC_SEQ_CST);
#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);
#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();
}
/* vi: set ts=4 sw=4 expandtab: */

191
externals/SDL/src/atomic/SDL_spinlock.c vendored Executable file
View File

@@ -0,0 +1,191 @@
/*
Simple DirectMedia Layer
Copyright (C) 1997-2020 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__)
#include "../core/windows/SDL_windows.h"
#endif
#include "SDL_atomic.h"
#include "SDL_mutex.h"
#include "SDL_timer.h"
#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
#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__ */
/* This function is where all the magic happens... */
SDL_bool
SDL_AtomicTryLock(SDL_SpinLock *lock)
{
#if SDL_ATOMIC_DISABLED
/* Terrible terrible damage */
static SDL_mutex *_spinlock_mutex;
if (!_spinlock_mutex) {
/* 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(_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 HAVE_GCC_ATOMICS || HAVE_GCC_SYNC_LOCK_TEST_AND_SET
return (__sync_lock_test_and_set(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;
#if defined(__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(__MACOSX__) || defined(__IPHONEOS__)
/* 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);
#else
#error Please implement for your platform.
return SDL_FALSE;
#endif
}
/* "REP NOP" is PAUSE, coded for tools that don't know it by that name. */
#if (defined(__GNUC__) || defined(__clang__)) && (defined(__i386__) || defined(__x86_64__))
#define PAUSE_INSTRUCTION() __asm__ __volatile__("pause\n") /* Some assemblers can't do REP NOP, so go with PAUSE. */
#elif defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64))
#define PAUSE_INSTRUCTION() _mm_pause() /* this is actually "rep nop" and not a SIMD instruction. No inline asm in MSVC x86-64! */
#elif defined(__WATCOMC__) && defined(__386__)
/* watcom assembler rejects PAUSE if CPU < i686, and it refuses REP NOP as an invalid combination. Hardcode the bytes. */
extern _inline void PAUSE_INSTRUCTION(void);
#pragma aux PAUSE_INSTRUCTION = "db 0f3h,90h"
#else
#define PAUSE_INSTRUCTION()
#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++;
PAUSE_INSTRUCTION();
} 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(_MSC_VER)
_ReadWriteBarrier();
*lock = 0;
#elif defined(__WATCOMC__) && defined(__386__)
SDL_CompilerBarrier ();
*lock = 0;
#elif HAVE_GCC_ATOMICS || HAVE_GCC_SYNC_LOCK_TEST_AND_SET
__sync_lock_release(lock);
#elif defined(__SOLARIS__)
/* Used for Solaris when not using gcc. */
*lock = 0;
membar_producer();
#else
*lock = 0;
#endif
}
/* vi: set ts=4 sw=4 expandtab: */