From 9d4ad79af16538fc3a77ff824f5d8d70cd17baa4 Mon Sep 17 00:00:00 2001
From: Cpasjuste <cpasjuste@gmail.com>
Date: Tue, 13 Mar 2018 20:28:44 +0100
Subject: [PATCH] SWITCH: thread fix

---
 src/thread/switch/SDL_sysmutex.c  | 53 +++++--------------------------
 src/thread/switch/SDL_syssem.c    |  2 +-
 src/thread/switch/SDL_systhread.c | 10 +++---
 3 files changed, 15 insertions(+), 50 deletions(-)

diff --git a/src/thread/switch/SDL_sysmutex.c b/src/thread/switch/SDL_sysmutex.c
index 6f2b07aee..3789046a9 100644
--- a/src/thread/switch/SDL_sysmutex.c
+++ b/src/thread/switch/SDL_sysmutex.c
@@ -29,26 +29,21 @@
 
 struct SDL_mutex
 {
-    int recursive;
-    Uint32 owner;
-    Mutex mutex;
+    RMutex mtx;
 };
 
 /* Create a mutex */
 SDL_mutex *
 SDL_CreateMutex(void)
 {
-    SDL_mutex *mutex;
-
-    mutex = (SDL_mutex *) SDL_malloc(sizeof(*mutex));
+    SDL_mutex *mutex = (SDL_mutex *) SDL_malloc(sizeof(*mutex));
     if (mutex) {
-        mutexInit(&mutex->mutex);
-        mutex->recursive = 0;
-        mutex->owner = 0;
+        rmutexInit(&mutex->mtx);
     }
     else {
         SDL_OutOfMemory();
     }
+
     return mutex;
 }
 
@@ -65,26 +60,11 @@ SDL_DestroyMutex(SDL_mutex *mutex)
 int
 SDL_mutexP(SDL_mutex *mutex)
 {
-    Uint32 this_thread;
-
     if (mutex == NULL) {
-        SDL_SetError("Passed a NULL mutex");
-        return -1;
+        return SDL_SetError("Passed a NULL mutex");
     }
 
-    this_thread = (Uint32) SDL_ThreadID();
-    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.
-        */
-        mutexLock(&mutex->mutex);
-        mutex->owner = this_thread;
-        mutex->recursive = 0;
-    }
+    rmutexLock(&mutex->mtx);
 
     return 0;
 }
@@ -94,28 +74,11 @@ int
 SDL_mutexV(SDL_mutex *mutex)
 {
     if (mutex == NULL) {
-        SDL_SetError("Passed a NULL mutex");
-        return -1;
+        return SDL_SetError("Passed a NULL mutex");
     }
 
-    /* If we don't own the mutex, we can't unlock it */
-    if (SDL_ThreadID() != mutex->owner) {
-        SDL_SetError("mutex not owned by this thread");
-        return -1;
-    }
+    rmutexUnlock(&mutex->mtx);
 
-    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;
-        mutexUnlock(&mutex->mutex);
-    }
     return 0;
 }
 
diff --git a/src/thread/switch/SDL_syssem.c b/src/thread/switch/SDL_syssem.c
index 9863d3637..6a8d20701 100644
--- a/src/thread/switch/SDL_syssem.c
+++ b/src/thread/switch/SDL_syssem.c
@@ -22,7 +22,7 @@
 
 #if SDL_THREAD_SWITCH
 
-/* Semaphore functions for the VITA. */
+/* Semaphore functions for the SWITCH. */
 
 #include <stdio.h>
 
diff --git a/src/thread/switch/SDL_systhread.c b/src/thread/switch/SDL_systhread.c
index b7e2b0560..e704d3683 100644
--- a/src/thread/switch/SDL_systhread.c
+++ b/src/thread/switch/SDL_systhread.c
@@ -25,6 +25,7 @@
 /* SWITCH thread management routines for SDL */
 
 #include <stdio.h>
+#include <switch.h>
 
 #include "SDL_error.h"
 #include "SDL_thread.h"
@@ -32,14 +33,15 @@
 
 #define STACK_SIZE 0x2000
 
-static void ThreadEntry(void *argp)
+void
+SDL_SYS_RunThread(void *data)
 {
-    SDL_RunThread(*(void **) argp);
+    SDL_RunThread(data);
 }
 
 int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
 {
-    Result res = threadCreate(&thread->handle, ThreadEntry, args, STACK_SIZE, 0x2C, -2);
+    Result res = threadCreate(&thread->handle, SDL_SYS_RunThread, args, STACK_SIZE, 0x2B, -2);
     if (res != 0) {
         return SDL_SetError("threadCreate() failed: 0x%08X", res);
     }
@@ -59,7 +61,7 @@ void SDL_SYS_SetupThread(const char *name)
 
 SDL_threadID SDL_ThreadID(void)
 {
-    return (SDL_threadID) 0;
+    return (SDL_threadID) armGetTls();
 }
 
 void SDL_SYS_WaitThread(SDL_Thread *thread)