initial commit, 4.5 stable

thirdparty/sdl/thread/pthread/SDL_syscond.c

@@ -0,0 +1,128 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 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 <sys/time.h>
+#include <time.h>
+#include <unistd.h>
+#include <errno.h>
+#include <pthread.h>
+
+#include "SDL_sysmutex_c.h"
+
+struct SDL_Condition
+{
+    pthread_cond_t cond;
+};
+
+// Create a condition variable
+SDL_Condition *SDL_CreateCondition(void)
+{
+    SDL_Condition *cond;
+
+    cond = (SDL_Condition *)SDL_malloc(sizeof(SDL_Condition));
+    if (cond) {
+        if (pthread_cond_init(&cond->cond, NULL) != 0) {
+            SDL_SetError("pthread_cond_init() failed");
+            SDL_free(cond);
+            cond = NULL;
+        }
+    }
+    return cond;
+}
+
+// Destroy a condition variable
+void SDL_DestroyCondition(SDL_Condition *cond)
+{
+    if (cond) {
+        pthread_cond_destroy(&cond->cond);
+        SDL_free(cond);
+    }
+}
+
+// Restart one of the threads that are waiting on the condition variable
+void SDL_SignalCondition(SDL_Condition *cond)
+{
+    if (!cond) {
+        return;
+    }
+
+    pthread_cond_signal(&cond->cond);
+}
+
+// Restart all threads that are waiting on the condition variable
+void SDL_BroadcastCondition(SDL_Condition *cond)
+{
+    if (!cond) {
+        return;
+    }
+
+    pthread_cond_broadcast(&cond->cond);
+}
+
+bool SDL_WaitConditionTimeoutNS(SDL_Condition *cond, SDL_Mutex *mutex, Sint64 timeoutNS)
+{
+#ifndef HAVE_CLOCK_GETTIME
+    struct timeval delta;
+#endif
+    struct timespec abstime;
+
+    if (!cond || !mutex) {
+        return true;
+    }
+
+    if (timeoutNS < 0) {
+        return (pthread_cond_wait(&cond->cond, &mutex->id) == 0);
+    }
+
+#ifdef HAVE_CLOCK_GETTIME
+    clock_gettime(CLOCK_REALTIME, &abstime);
+
+    abstime.tv_sec += (timeoutNS / SDL_NS_PER_SECOND);
+    abstime.tv_nsec += (timeoutNS % SDL_NS_PER_SECOND);
+#else
+    gettimeofday(&delta, NULL);
+
+    abstime.tv_sec = delta.tv_sec + (timeoutNS / SDL_NS_PER_SECOND);
+    abstime.tv_nsec = SDL_US_TO_NS(delta.tv_usec) + (timeoutNS % SDL_NS_PER_SECOND);
+#endif
+    while (abstime.tv_nsec >= 1000000000) {
+        abstime.tv_sec += 1;
+        abstime.tv_nsec -= 1000000000;
+    }
+
+    bool result;
+    int rc;
+tryagain:
+    rc = pthread_cond_timedwait(&cond->cond, &mutex->id, &abstime);
+    switch (rc) {
+    case EINTR:
+        goto tryagain;
+        // break; -Wunreachable-code-break
+    case ETIMEDOUT:
+        result = false;
+        break;
+    default:
+        result = true;
+        break;
+    }
+    return result;
+}

thirdparty/sdl/thread/pthread/SDL_sysmutex.c

@@ -0,0 +1,154 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 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 <errno.h>
+#include <pthread.h>
+
+#include "SDL_sysmutex_c.h"
+
+SDL_Mutex *SDL_CreateMutex(void)
+{
+    SDL_Mutex *mutex;
+    pthread_mutexattr_t attr;
+
+    // Allocate the structure
+    mutex = (SDL_Mutex *)SDL_calloc(1, sizeof(*mutex));
+    if (mutex) {
+        pthread_mutexattr_init(&attr);
+#ifdef SDL_THREAD_PTHREAD_RECURSIVE_MUTEX
+        pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
+#elif defined(SDL_THREAD_PTHREAD_RECURSIVE_MUTEX_NP)
+        pthread_mutexattr_setkind_np(&attr, PTHREAD_MUTEX_RECURSIVE_NP);
+#else
+        // No extra attributes necessary
+#endif
+        if (pthread_mutex_init(&mutex->id, &attr) != 0) {
+            SDL_SetError("pthread_mutex_init() failed");
+            SDL_free(mutex);
+            mutex = NULL;
+        }
+    }
+    return mutex;
+}
+
+void SDL_DestroyMutex(SDL_Mutex *mutex)
+{
+    if (mutex) {
+        pthread_mutex_destroy(&mutex->id);
+        SDL_free(mutex);
+    }
+}
+
+void SDL_LockMutex(SDL_Mutex *mutex) SDL_NO_THREAD_SAFETY_ANALYSIS // clang doesn't know about NULL mutexes
+{
+    if (mutex) {
+#ifdef FAKE_RECURSIVE_MUTEX
+        pthread_t this_thread = pthread_self();
+        if (mutex->owner == this_thread) {
+            ++mutex->recursive;
+        } else {
+            /* The order of operations is important.
+               We set the locking thread id after we obtain the lock
+               so unlocks from other threads will fail.
+             */
+            const int rc = pthread_mutex_lock(&mutex->id);
+            SDL_assert(rc == 0);  // assume we're in a lot of trouble if this assert fails.
+            mutex->owner = this_thread;
+            mutex->recursive = 0;
+        }
+#else
+        const int rc = pthread_mutex_lock(&mutex->id);
+        SDL_assert(rc == 0);  // assume we're in a lot of trouble if this assert fails.
+#endif
+    }
+}
+
+bool SDL_TryLockMutex(SDL_Mutex *mutex)
+{
+    bool result = true;
+
+    if (mutex) {
+#ifdef FAKE_RECURSIVE_MUTEX
+        pthread_t this_thread = pthread_self();
+        if (mutex->owner == this_thread) {
+            ++mutex->recursive;
+        } else {
+            /* The order of operations is important.
+               We set the locking thread id after we obtain the lock
+               so unlocks from other threads will fail.
+             */
+            const int rc = pthread_mutex_trylock(&mutex->id);
+            if (rc == 0) {
+                mutex->owner = this_thread;
+                mutex->recursive = 0;
+            } else if (rc == EBUSY) {
+                result = false;
+            } else {
+                SDL_assert(!"Error trying to lock mutex");  // assume we're in a lot of trouble if this assert fails.
+                result = false;
+            }
+        }
+#else
+        const int rc = pthread_mutex_trylock(&mutex->id);
+        if (rc != 0) {
+            if (rc == EBUSY) {
+                result = false;
+            } else {
+                SDL_assert(!"Error trying to lock mutex");  // assume we're in a lot of trouble if this assert fails.
+                result = false;
+            }
+        }
+#endif
+    }
+
+    return result;
+}
+
+void SDL_UnlockMutex(SDL_Mutex *mutex) SDL_NO_THREAD_SAFETY_ANALYSIS // clang doesn't know about NULL mutexes
+{
+    if (mutex) {
+#ifdef FAKE_RECURSIVE_MUTEX
+        // We can only unlock the mutex if we own it
+        if (pthread_self() == mutex->owner) {
+            if (mutex->recursive) {
+                --mutex->recursive;
+            } else {
+                /* The order of operations is important.
+                   First reset the owner so another thread doesn't lock
+                   the mutex and set the ownership before we reset it,
+                   then release the lock semaphore.
+                 */
+                mutex->owner = 0;
+                pthread_mutex_unlock(&mutex->id);
+            }
+        } else {
+            SDL_SetError("mutex not owned by this thread");
+            return;
+        }
+
+#else
+        const int rc = pthread_mutex_unlock(&mutex->id);
+        SDL_assert(rc == 0);  // assume we're in a lot of trouble if this assert fails.
+#endif // FAKE_RECURSIVE_MUTEX
+    }
+}
+

thirdparty/sdl/thread/pthread/SDL_sysmutex_c.h

@@ -0,0 +1,40 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 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"
+
+#ifndef SDL_mutex_c_h_
+#define SDL_mutex_c_h_
+
+#if !(defined(SDL_THREAD_PTHREAD_RECURSIVE_MUTEX) || \
+    defined(SDL_THREAD_PTHREAD_RECURSIVE_MUTEX_NP))
+#define FAKE_RECURSIVE_MUTEX
+#endif
+
+struct SDL_Mutex
+{
+    pthread_mutex_t id;
+#ifdef FAKE_RECURSIVE_MUTEX
+    int recursive;
+    pthread_t owner;
+#endif
+};
+
+#endif // SDL_mutex_c_h_

thirdparty/sdl/thread/pthread/SDL_sysrwlock.c

@@ -0,0 +1,113 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 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 <errno.h>
+#include <pthread.h>
+
+struct SDL_RWLock
+{
+    pthread_rwlock_t id;
+};
+
+
+SDL_RWLock *SDL_CreateRWLock(void)
+{
+    SDL_RWLock *rwlock;
+
+    // Allocate the structure
+    rwlock = (SDL_RWLock *)SDL_calloc(1, sizeof(*rwlock));
+    if (rwlock) {
+        if (pthread_rwlock_init(&rwlock->id, NULL) != 0) {
+            SDL_SetError("pthread_rwlock_init() failed");
+            SDL_free(rwlock);
+            rwlock = NULL;
+        }
+    }
+    return rwlock;
+}
+
+void SDL_DestroyRWLock(SDL_RWLock *rwlock)
+{
+    if (rwlock) {
+        pthread_rwlock_destroy(&rwlock->id);
+        SDL_free(rwlock);
+    }
+}
+
+void SDL_LockRWLockForReading(SDL_RWLock *rwlock) SDL_NO_THREAD_SAFETY_ANALYSIS  // clang doesn't know about NULL mutexes
+{
+    if (rwlock) {
+        const int rc = pthread_rwlock_rdlock(&rwlock->id);
+        SDL_assert(rc == 0);  // assume we're in a lot of trouble if this assert fails.
+    }
+}
+
+void SDL_LockRWLockForWriting(SDL_RWLock *rwlock) SDL_NO_THREAD_SAFETY_ANALYSIS  // clang doesn't know about NULL mutexes
+{
+    if (rwlock) {
+        const int rc = pthread_rwlock_wrlock(&rwlock->id);
+        SDL_assert(rc == 0);  // assume we're in a lot of trouble if this assert fails.
+    }
+}
+
+bool SDL_TryLockRWLockForReading(SDL_RWLock *rwlock)
+{
+    bool result = true;
+
+    if (rwlock) {
+        const int rc = pthread_rwlock_tryrdlock(&rwlock->id);
+        if (rc != 0) {
+            result = false;
+            if (rc != EBUSY) {
+                SDL_assert(!"Error trying to lock rwlock for reading");  // assume we're in a lot of trouble if this assert fails.
+            }
+        }
+    }
+
+    return result;
+}
+
+bool SDL_TryLockRWLockForWriting(SDL_RWLock *rwlock)
+{
+    bool result = true;
+
+    if (rwlock) {
+        const int rc = pthread_rwlock_trywrlock(&rwlock->id);
+        if (rc != 0) {
+            result = false;
+            if (rc != EBUSY) {
+                SDL_assert(!"Error trying to lock rwlock for writing");  // assume we're in a lot of trouble if this assert fails.
+            }
+        }
+    }
+
+    return result;
+}
+
+void SDL_UnlockRWLock(SDL_RWLock *rwlock) SDL_NO_THREAD_SAFETY_ANALYSIS  // clang doesn't know about NULL mutexes
+{
+    if (rwlock) {
+        const int rc = pthread_rwlock_unlock(&rwlock->id);
+        SDL_assert(rc == 0);  // assume we're in a lot of trouble if this assert fails.
+    }
+}
+

thirdparty/sdl/thread/pthread/SDL_syssem.c

@@ -0,0 +1,160 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 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 <errno.h>
+#include <pthread.h>
+#include <semaphore.h>
+#include <sys/time.h>
+#include <time.h>
+
+// Wrapper around POSIX 1003.1b semaphores
+
+#if defined(SDL_PLATFORM_MACOS) || defined(SDL_PLATFORM_IOS)
+// macOS doesn't support sem_getvalue() as of version 10.4
+#include "../generic/SDL_syssem.c"
+#else
+
+struct SDL_Semaphore
+{
+    sem_t sem;
+};
+
+// Create a semaphore, initialized with value
+SDL_Semaphore *SDL_CreateSemaphore(Uint32 initial_value)
+{
+    SDL_Semaphore *sem = (SDL_Semaphore *)SDL_malloc(sizeof(SDL_Semaphore));
+    if (sem) {
+        if (sem_init(&sem->sem, 0, initial_value) < 0) {
+            SDL_SetError("sem_init() failed");
+            SDL_free(sem);
+            sem = NULL;
+        }
+    }
+    return sem;
+}
+
+void SDL_DestroySemaphore(SDL_Semaphore *sem)
+{
+    if (sem) {
+        sem_destroy(&sem->sem);
+        SDL_free(sem);
+    }
+}
+
+bool SDL_WaitSemaphoreTimeoutNS(SDL_Semaphore *sem, Sint64 timeoutNS)
+{
+#ifdef HAVE_SEM_TIMEDWAIT
+#ifndef HAVE_CLOCK_GETTIME
+    struct timeval now;
+#endif
+    struct timespec ts_timeout;
+#else
+    Uint64 stop_time;
+#endif
+
+    if (!sem) {
+        return true;
+    }
+
+    // Try the easy cases first
+    if (timeoutNS == 0) {
+        return (sem_trywait(&sem->sem) == 0);
+    }
+
+    if (timeoutNS < 0) {
+        int rc;
+        do {
+            rc = sem_wait(&sem->sem);
+        } while (rc < 0 && errno == EINTR);
+
+        return (rc == 0);
+    }
+
+#ifdef HAVE_SEM_TIMEDWAIT
+    /* Setup the timeout. sem_timedwait doesn't wait for
+     * a lapse of time, but until we reach a certain time.
+     * This time is now plus the timeout.
+     */
+#ifdef HAVE_CLOCK_GETTIME
+    clock_gettime(CLOCK_REALTIME, &ts_timeout);
+
+    // Add our timeout to current time
+    ts_timeout.tv_sec += (timeoutNS / SDL_NS_PER_SECOND);
+    ts_timeout.tv_nsec += (timeoutNS % SDL_NS_PER_SECOND);
+#else
+    gettimeofday(&now, NULL);
+
+    // Add our timeout to current time
+    ts_timeout.tv_sec = now.tv_sec + (timeoutNS / SDL_NS_PER_SECOND);
+    ts_timeout.tv_nsec = SDL_US_TO_NS(now.tv_usec) + (timeoutNS % SDL_NS_PER_SECOND);
+#endif
+
+    // Wrap the second if needed
+    while (ts_timeout.tv_nsec >= 1000000000) {
+        ts_timeout.tv_sec += 1;
+        ts_timeout.tv_nsec -= 1000000000;
+    }
+
+    // Wait.
+    int rc;
+    do {
+        rc = sem_timedwait(&sem->sem, &ts_timeout);
+    } while (rc < 0 && errno == EINTR);
+
+    return (rc == 0);
+#else
+    stop_time = SDL_GetTicksNS() + timeoutNS;
+    while (sem_trywait(&sem->sem) != 0) {
+        if (SDL_GetTicksNS() >= stop_time) {
+            return false;
+        }
+        SDL_DelayNS(100);
+    }
+    return true;
+#endif // HAVE_SEM_TIMEDWAIT
+}
+
+Uint32 SDL_GetSemaphoreValue(SDL_Semaphore *sem)
+{
+    int ret = 0;
+
+    if (!sem) {
+        return 0;
+    }
+
+    sem_getvalue(&sem->sem, &ret);
+    if (ret < 0) {
+        ret = 0;
+    }
+    return (Uint32)ret;
+}
+
+void SDL_SignalSemaphore(SDL_Semaphore *sem)
+{
+    if (!sem) {
+        return;
+    }
+
+    sem_post(&sem->sem);
+}
+
+#endif // SDL_PLATFORM_MACOS

thirdparty/sdl/thread/pthread/SDL_systhread.c

@@ -0,0 +1,293 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 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 <pthread.h>
+
+#ifdef HAVE_PTHREAD_NP_H
+#include <pthread_np.h>
+#endif
+
+#ifdef HAVE_SIGNAL_H
+#include <signal.h>
+#endif
+#include <errno.h>
+
+#ifdef SDL_PLATFORM_LINUX
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+
+#include "../../core/linux/SDL_dbus.h"
+#endif // SDL_PLATFORM_LINUX
+
+#if (defined(SDL_PLATFORM_LINUX) || defined(SDL_PLATFORM_ANDROID) || defined(SDL_PLATFORM_MACOS) || defined(SDL_PLATFORM_IOS)) && defined(HAVE_DLOPEN)
+#include <dlfcn.h>
+#ifndef RTLD_DEFAULT
+#define RTLD_DEFAULT NULL
+#endif
+#endif
+
+#include "../SDL_thread_c.h"
+#include "../SDL_systhread.h"
+#ifdef SDL_PLATFORM_ANDROID
+#include "../../core/android/SDL_android.h"
+#endif
+
+#ifdef SDL_PLATFORM_HAIKU
+#include <kernel/OS.h>
+#endif
+
+#ifdef HAVE_SIGNAL_H
+// List of signals to mask in the subthreads
+static const int sig_list[] = {
+    SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGCHLD, SIGWINCH,
+    SIGVTALRM, SIGPROF, 0
+};
+#endif
+
+static void *RunThread(void *data)
+{
+#ifdef SDL_PLATFORM_ANDROID
+    Android_JNI_SetupThread();
+#endif
+    SDL_RunThread((SDL_Thread *)data);
+    return NULL;
+}
+
+#if (defined(SDL_PLATFORM_MACOS) || defined(SDL_PLATFORM_IOS)) && defined(HAVE_DLOPEN)
+static bool checked_setname = false;
+static int (*ppthread_setname_np)(const char *) = NULL;
+#elif (defined(SDL_PLATFORM_LINUX) || defined(SDL_PLATFORM_ANDROID)) && defined(HAVE_DLOPEN)
+static bool checked_setname = false;
+static int (*ppthread_setname_np)(pthread_t, const char *) = NULL;
+#endif
+bool SDL_SYS_CreateThread(SDL_Thread *thread,
+                          SDL_FunctionPointer pfnBeginThread,
+                          SDL_FunctionPointer pfnEndThread)
+{
+    pthread_attr_t type;
+
+// do this here before any threads exist, so there's no race condition.
+#if (defined(SDL_PLATFORM_MACOS) || defined(SDL_PLATFORM_IOS) || defined(SDL_PLATFORM_LINUX) || defined(SDL_PLATFORM_ANDROID)) && defined(HAVE_DLOPEN)
+    if (!checked_setname) {
+        void *fn = dlsym(RTLD_DEFAULT, "pthread_setname_np");
+#if defined(SDL_PLATFORM_MACOS) || defined(SDL_PLATFORM_IOS)
+        ppthread_setname_np = (int (*)(const char *))fn;
+#elif defined(SDL_PLATFORM_LINUX) || defined(SDL_PLATFORM_ANDROID)
+        ppthread_setname_np = (int (*)(pthread_t, const char *))fn;
+#endif
+        checked_setname = true;
+    }
+    #endif
+
+    // Set the thread attributes
+    if (pthread_attr_init(&type) != 0) {
+        return SDL_SetError("Couldn't initialize pthread attributes");
+    }
+    pthread_attr_setdetachstate(&type, PTHREAD_CREATE_JOINABLE);
+
+    // Set caller-requested stack size. Otherwise: use the system default.
+    if (thread->stacksize) {
+        pthread_attr_setstacksize(&type, thread->stacksize);
+    }
+
+    // Create the thread and go!
+    if (pthread_create(&thread->handle, &type, RunThread, thread) != 0) {
+        return SDL_SetError("Not enough resources to create thread");
+    }
+
+    return true;
+}
+
+void SDL_SYS_SetupThread(const char *name)
+{
+#ifdef HAVE_SIGNAL_H
+    int i;
+    sigset_t mask;
+#endif
+
+    if (name) {
+#if (defined(SDL_PLATFORM_MACOS) || defined(SDL_PLATFORM_IOS) || defined(SDL_PLATFORM_LINUX) || defined(SDL_PLATFORM_ANDROID)) && defined(HAVE_DLOPEN)
+        SDL_assert(checked_setname);
+        if (ppthread_setname_np) {
+#if defined(SDL_PLATFORM_MACOS) || defined(SDL_PLATFORM_IOS)
+            ppthread_setname_np(name);
+#elif defined(SDL_PLATFORM_LINUX) || defined(SDL_PLATFORM_ANDROID)
+            if (ppthread_setname_np(pthread_self(), name) == ERANGE) {
+                char namebuf[16]; // Limited to 16 char
+                SDL_strlcpy(namebuf, name, sizeof(namebuf));
+                ppthread_setname_np(pthread_self(), namebuf);
+            }
+#endif
+        }
+#elif defined(HAVE_PTHREAD_SETNAME_NP)
+#ifdef SDL_PLATFORM_NETBSD
+        pthread_setname_np(pthread_self(), "%s", name);
+#else
+        if (pthread_setname_np(pthread_self(), name) == ERANGE) {
+            char namebuf[16]; // Limited to 16 char
+            SDL_strlcpy(namebuf, name, sizeof(namebuf));
+            pthread_setname_np(pthread_self(), namebuf);
+        }
+#endif
+#elif defined(HAVE_PTHREAD_SET_NAME_NP)
+        pthread_set_name_np(pthread_self(), name);
+#elif defined(SDL_PLATFORM_HAIKU)
+        // The docs say the thread name can't be longer than B_OS_NAME_LENGTH.
+        char namebuf[B_OS_NAME_LENGTH];
+        SDL_strlcpy(namebuf, name, sizeof(namebuf));
+        rename_thread(find_thread(NULL), namebuf);
+#endif
+    }
+
+#ifdef HAVE_SIGNAL_H
+    // Mask asynchronous signals for this thread
+    sigemptyset(&mask);
+    for (i = 0; sig_list[i]; ++i) {
+        sigaddset(&mask, sig_list[i]);
+    }
+    pthread_sigmask(SIG_BLOCK, &mask, 0);
+#endif
+
+#ifdef PTHREAD_CANCEL_ASYNCHRONOUS
+    // Allow ourselves to be asynchronously cancelled
+    {
+        int oldstate;
+        pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &oldstate);
+    }
+#endif
+}
+
+SDL_ThreadID SDL_GetCurrentThreadID(void)
+{
+    return (SDL_ThreadID)pthread_self();
+}
+
+bool SDL_SYS_SetThreadPriority(SDL_ThreadPriority priority)
+{
+#ifdef SDL_PLATFORM_RISCOS
+    // FIXME: Setting thread priority does not seem to be supported
+    return true;
+#else
+    struct sched_param sched;
+    int policy;
+    int pri_policy;
+    pthread_t thread = pthread_self();
+    const char *policyhint = SDL_GetHint(SDL_HINT_THREAD_PRIORITY_POLICY);
+    const bool timecritical_realtime_hint = SDL_GetHintBoolean(SDL_HINT_THREAD_FORCE_REALTIME_TIME_CRITICAL, false);
+
+    if (pthread_getschedparam(thread, &policy, &sched) != 0) {
+        return SDL_SetError("pthread_getschedparam() failed");
+    }
+
+    /* Higher priority levels may require changing the pthread scheduler policy
+     * for the thread.  SDL will make such changes by default but there is
+     * also a hint allowing that behavior to be overridden. */
+    switch (priority) {
+    case SDL_THREAD_PRIORITY_LOW:
+    case SDL_THREAD_PRIORITY_NORMAL:
+        pri_policy = SCHED_OTHER;
+        break;
+    case SDL_THREAD_PRIORITY_HIGH:
+    case SDL_THREAD_PRIORITY_TIME_CRITICAL:
+#if defined(SDL_PLATFORM_MACOS) || defined(SDL_PLATFORM_IOS) || defined(SDL_PLATFORM_TVOS)
+        // Apple requires SCHED_RR for high priority threads
+        pri_policy = SCHED_RR;
+        break;
+#else
+        pri_policy = SCHED_OTHER;
+        break;
+#endif
+    default:
+        pri_policy = policy;
+        break;
+    }
+
+    if (timecritical_realtime_hint && priority == SDL_THREAD_PRIORITY_TIME_CRITICAL) {
+        pri_policy = SCHED_RR;
+    }
+
+    if (policyhint) {
+        if (SDL_strcmp(policyhint, "current") == 0) {
+            // Leave current thread scheduler policy unchanged
+        } else if (SDL_strcmp(policyhint, "other") == 0) {
+            policy = SCHED_OTHER;
+        } else if (SDL_strcmp(policyhint, "rr") == 0) {
+            policy = SCHED_RR;
+        } else if (SDL_strcmp(policyhint, "fifo") == 0) {
+            policy = SCHED_FIFO;
+        } else {
+            policy = pri_policy;
+        }
+    } else {
+        policy = pri_policy;
+    }
+
+#ifdef SDL_PLATFORM_LINUX
+    {
+        pid_t linuxTid = syscall(SYS_gettid);
+        return SDL_SetLinuxThreadPriorityAndPolicy(linuxTid, priority, policy);
+    }
+#else
+    if (priority == SDL_THREAD_PRIORITY_LOW) {
+        sched.sched_priority = sched_get_priority_min(policy);
+    } else if (priority == SDL_THREAD_PRIORITY_TIME_CRITICAL) {
+        sched.sched_priority = sched_get_priority_max(policy);
+    } else {
+        int min_priority = sched_get_priority_min(policy);
+        int max_priority = sched_get_priority_max(policy);
+
+#if defined(SDL_PLATFORM_MACOS) || defined(SDL_PLATFORM_IOS) || defined(SDL_PLATFORM_TVOS)
+        if (min_priority == 15 && max_priority == 47) {
+            // Apple has a specific set of thread priorities
+            if (priority == SDL_THREAD_PRIORITY_HIGH) {
+                sched.sched_priority = 45;
+            } else {
+                sched.sched_priority = 37;
+            }
+        } else
+#endif // SDL_PLATFORM_MACOS || SDL_PLATFORM_IOS || SDL_PLATFORM_TVOS
+        {
+            sched.sched_priority = (min_priority + (max_priority - min_priority) / 2);
+            if (priority == SDL_THREAD_PRIORITY_HIGH) {
+                sched.sched_priority += ((max_priority - min_priority) / 4);
+            }
+        }
+    }
+    if (pthread_setschedparam(thread, policy, &sched) != 0) {
+        return SDL_SetError("pthread_setschedparam() failed");
+    }
+    return true;
+#endif // linux
+#endif // #if SDL_PLATFORM_RISCOS
+}
+
+void SDL_SYS_WaitThread(SDL_Thread *thread)
+{
+    pthread_join(thread->handle, 0);
+}
+
+void SDL_SYS_DetachThread(SDL_Thread *thread)
+{
+    pthread_detach(thread->handle);
+}

thirdparty/sdl/thread/pthread/SDL_systhread_c.h

@@ -0,0 +1,25 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 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 <pthread.h>
+
+typedef pthread_t SYS_ThreadHandle;

thirdparty/sdl/thread/pthread/SDL_systls.c

@@ -0,0 +1,78 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 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_systhread.h"
+#include "../SDL_thread_c.h"
+
+#include <pthread.h>
+
+#define INVALID_PTHREAD_KEY ((pthread_key_t)-1)
+
+static pthread_key_t thread_local_storage = INVALID_PTHREAD_KEY;
+static bool generic_local_storage = false;
+
+void SDL_SYS_InitTLSData(void)
+{
+    if (thread_local_storage == INVALID_PTHREAD_KEY && !generic_local_storage) {
+        if (pthread_key_create(&thread_local_storage, NULL) != 0) {
+            thread_local_storage = INVALID_PTHREAD_KEY;
+            SDL_Generic_InitTLSData();
+            generic_local_storage = true;
+        }
+    }
+}
+
+SDL_TLSData *SDL_SYS_GetTLSData(void)
+{
+    if (generic_local_storage) {
+        return SDL_Generic_GetTLSData();
+    }
+
+    if (thread_local_storage != INVALID_PTHREAD_KEY) {
+        return (SDL_TLSData *)pthread_getspecific(thread_local_storage);
+    }
+    return NULL;
+}
+
+bool SDL_SYS_SetTLSData(SDL_TLSData *data)
+{
+    if (generic_local_storage) {
+        return SDL_Generic_SetTLSData(data);
+    }
+
+    if (pthread_setspecific(thread_local_storage, data) != 0) {
+        return SDL_SetError("pthread_setspecific() failed");
+    }
+    return true;
+}
+
+void SDL_SYS_QuitTLSData(void)
+{
+    if (generic_local_storage) {
+        SDL_Generic_QuitTLSData();
+        generic_local_storage = false;
+    } else {
+        if (thread_local_storage != INVALID_PTHREAD_KEY) {
+            pthread_key_delete(thread_local_storage);
+            thread_local_storage = INVALID_PTHREAD_KEY;
+        }
+    }
+}