1 files changed, 202 insertions, 0 deletions

diff --git a/contrib/SDL-3.2.8/src/hidapi/libusb/hidapi_thread_sdl.h b/contrib/SDL-3.2.8/src/hidapi/libusb/hidapi_thread_sdl.h
new file mode 100644
index 0000000..1f5c7db
--- /dev/null
+++ b/contrib/SDL-3.2.8/src/hidapi/libusb/hidapi_thread_sdl.h
@@ -0,0 +1,202 @@
+/*
+  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.
+*/
+
+/* Barrier implementation because Android/Bionic don't have pthread_barrier.
+   This implementation came from Brent Priddy and was posted on
+   StackOverflow. It is used with his permission. */
+
+typedef struct _SDL_ThreadBarrier
+{
+    SDL_Mutex *mutex;
+    SDL_Condition *cond;
+    Uint32 count;
+    Uint32 trip_count;
+} SDL_ThreadBarrier;
+
+static int SDL_CreateThreadBarrier(SDL_ThreadBarrier *barrier, Uint32 count)
+{
+    SDL_assert(barrier != NULL);
+    SDL_assert(count != 0);
+
+    barrier->mutex = SDL_CreateMutex();
+    if (barrier->mutex == NULL) {
+        return -1; /* Error set by CreateMutex */
+    }
+    barrier->cond = SDL_CreateCondition();
+    if (barrier->cond == NULL) {
+        return -1; /* Error set by CreateCond */
+    }
+
+    barrier->trip_count = count;
+    barrier->count = 0;
+
+    return 0;
+}
+
+static void SDL_DestroyThreadBarrier(SDL_ThreadBarrier *barrier)
+{
+    SDL_DestroyCondition(barrier->cond);
+    SDL_DestroyMutex(barrier->mutex);
+}
+
+static int SDL_WaitThreadBarrier(SDL_ThreadBarrier *barrier)
+{
+    SDL_LockMutex(barrier->mutex);
+    barrier->count += 1;
+    if (barrier->count >= barrier->trip_count) {
+        barrier->count = 0;
+        SDL_BroadcastCondition(barrier->cond);
+        SDL_UnlockMutex(barrier->mutex);
+        return 1;
+    }
+    SDL_WaitCondition(barrier->cond, barrier->mutex);
+    SDL_UnlockMutex(barrier->mutex);
+    return 0;
+}
+
+#include "../../thread/SDL_systhread.h"
+
+#define HIDAPI_THREAD_TIMED_OUT 1
+
+typedef Uint64 hidapi_timespec;
+
+typedef struct
+{
+    SDL_Thread *thread;
+    SDL_Mutex *mutex; /* Protects input_reports */
+    SDL_Condition *condition;
+    SDL_ThreadBarrier barrier; /* Ensures correct startup sequence */
+
+} hidapi_thread_state;
+
+static void hidapi_thread_state_init(hidapi_thread_state *state)
+{
+    state->mutex = SDL_CreateMutex();
+    state->condition = SDL_CreateCondition();
+    SDL_CreateThreadBarrier(&state->barrier, 2);
+}
+
+static void hidapi_thread_state_destroy(hidapi_thread_state *state)
+{
+    SDL_DestroyThreadBarrier(&state->barrier);
+    SDL_DestroyCondition(state->condition);
+    SDL_DestroyMutex(state->mutex);
+}
+
+static void hidapi_thread_cleanup_push(void (*routine)(void *), void *arg)
+{
+    /* There isn't an equivalent in SDL, and it's only useful for threads calling hid_read_timeout() */
+}
+
+static void hidapi_thread_cleanup_pop(int execute)
+{
+}
+
+static void hidapi_thread_mutex_lock(hidapi_thread_state *state)
+{
+    SDL_LockMutex(state->mutex);
+}
+
+static void hidapi_thread_mutex_unlock(hidapi_thread_state *state)
+{
+    SDL_UnlockMutex(state->mutex);
+}
+
+static void hidapi_thread_cond_wait(hidapi_thread_state *state)
+{
+    SDL_WaitCondition(state->condition, state->mutex);
+}
+
+static int hidapi_thread_cond_timedwait(hidapi_thread_state *state, hidapi_timespec *ts)
+{
+    Sint64 timeout_ns;
+    Sint32 timeout_ms;
+
+    timeout_ns = (Sint64)(*ts - SDL_GetTicksNS());
+    if (timeout_ns <= 0) {
+        timeout_ms = 0;
+    } else {
+        timeout_ms = (Sint32)SDL_NS_TO_MS(timeout_ns);
+    }
+    if (SDL_WaitConditionTimeout(state->condition, state->mutex, timeout_ms)) {
+        return 0;
+    } else {
+        return HIDAPI_THREAD_TIMED_OUT;
+    }
+}
+
+static void hidapi_thread_cond_signal(hidapi_thread_state *state)
+{
+    SDL_SignalCondition(state->condition);
+}
+
+static void hidapi_thread_cond_broadcast(hidapi_thread_state *state)
+{
+    SDL_BroadcastCondition(state->condition);
+}
+
+static void hidapi_thread_barrier_wait(hidapi_thread_state *state)
+{
+    SDL_WaitThreadBarrier(&state->barrier);
+}
+
+typedef struct
+{
+    void *(*func)(void*);
+    void *func_arg;
+
+} RunInputThreadParam;
+
+static int RunInputThread(void *param)
+{
+    RunInputThreadParam *data = (RunInputThreadParam *)param;
+    void *(*func)(void*) = data->func;
+    void *func_arg = data->func_arg;
+    SDL_free(data);
+    func(func_arg);
+    return 0;
+}
+
+static void hidapi_thread_create(hidapi_thread_state *state, void *(*func)(void*), void *func_arg)
+{
+    RunInputThreadParam *param = (RunInputThreadParam *)malloc(sizeof(*param));
+    /* Note that the hidapi code didn't check for thread creation failure.
+     * We'll crash if malloc() fails
+     */
+    param->func = func;
+    param->func_arg = func_arg;
+    state->thread = SDL_CreateThread(RunInputThread, "libusb", param);
+}
+
+static void hidapi_thread_join(hidapi_thread_state *state)
+{
+    SDL_WaitThread(state->thread, NULL);
+}
+
+static void hidapi_thread_gettime(hidapi_timespec *ts)
+{
+    *ts = SDL_GetTicksNS();
+}
+
+static void hidapi_thread_addtime(hidapi_timespec *ts, int milliseconds)
+{
+    *ts += SDL_MS_TO_NS(milliseconds);
+}