From 17863a45b6aa508008a02f4e60b9c40df32f00ce Mon Sep 17 00:00:00 2001
From: jules <jules@rawmaterialsoftware.com>
Date: Tue, 24 Feb 2015 17:59:53 +0000
Subject: [PATCH] Workaround for problems on Android when the OS reuses a posix
 thread for the openGL thread.

---
 .../native/juce_android_JNIHelpers.h          | 20 ++++++++++++++-----
 .../juce_opengl/native/juce_OpenGL_android.h  |  1 +
 2 files changed, 16 insertions(+), 5 deletions(-)

diff --git a/modules/juce_core/native/juce_android_JNIHelpers.h b/modules/juce_core/native/juce_android_JNIHelpers.h
index 88869991bb..0c35c63dd2 100644
--- a/modules/juce_core/native/juce_android_JNIHelpers.h
+++ b/modules/juce_core/native/juce_android_JNIHelpers.h
@@ -290,13 +290,23 @@ public:
         if (android.activity != nullptr)
         {
             jvm->DetachCurrentThread();
+            removeCurrentThreadFromCache();
+        }
+    }
 
-            const pthread_t thisThread = pthread_self();
+    void removeCurrentThreadFromCache()
+    {
+        const pthread_t thisThread = pthread_self();
 
-            SpinLock::ScopedLockType sl (addRemoveLock);
-            for (int i = 0; i < maxThreads; ++i)
-                if (threads[i] == thisThread)
-                    threads[i] = 0;
+        SpinLock::ScopedLockType sl (addRemoveLock);
+
+        for (int i = 0; i < maxThreads; ++i)
+        {
+            if (threads[i] == thisThread)
+            {
+                threads[i] = 0;
+                envs[i] = nullptr;
+            }
         }
     }
 
diff --git a/modules/juce_opengl/native/juce_OpenGL_android.h b/modules/juce_opengl/native/juce_OpenGL_android.h
index 84983c766f..46ef9713da 100644
--- a/modules/juce_opengl/native/juce_OpenGL_android.h
+++ b/modules/juce_opengl/native/juce_OpenGL_android.h
@@ -161,6 +161,7 @@ bool OpenGLHelpers::isContextActive()
 
 JUCE_JNI_CALLBACK (GL_VIEW_CLASS_NAME, contextCreated, void, (JNIEnv* env, jobject view))
 {
+    threadLocalJNIEnvHolder.removeCurrentThreadFromCache();
     threadLocalJNIEnvHolder.getOrAttach();
 
     if (OpenGLContext::NativeContext* const context = OpenGLContext::NativeContext::findContextFor (env, view))