mirror of
https://github.com/Relintai/sdl2_frt.git
synced 2024-12-16 11:06:49 +01:00
Android: move and group JNIEnv helper functions
This commit is contained in:
Sylvain Becker
parent
7f3478305f
commit
7b42f03fd9
@ -46,12 +46,6 @@
|
||||
#include <sys/types.h>
|
||||
#include <unistd.h>
|
||||
#include <dlfcn.h>
|
||||
/* #define LOG_TAG "SDL_android" */
|
||||
/* #define LOGI(...) __android_log_print(ANDROID_LOG_INFO,LOG_TAG,__VA_ARGS__) */
|
||||
/* #define LOGE(...) __android_log_print(ANDROID_LOG_ERROR,LOG_TAG,__VA_ARGS__) */
|
||||
#define LOGI(...) do {} while (0)
|
||||
#define LOGE(...) do {} while (0)
|
||||
|
||||
|
||||
#define SDL_JAVA_PREFIX org_libsdl_app
|
||||
#define CONCAT1(prefix, class, function) CONCAT2(prefix, class, function)
|
||||
@ -212,7 +206,6 @@ JNIEXPORT jint JNICALL SDL_JAVA_CONTROLLER_INTERFACE(nativeRemoveHaptic)(
|
||||
/* Uncomment this to log messages entering and exiting methods in this file */
|
||||
/* #define DEBUG_JNI */
|
||||
|
||||
static void Android_JNI_ThreadDestroyed(void *);
|
||||
static void checkJNIReady(void);
|
||||
|
||||
/*******************************************************************************
|
||||
@ -293,13 +286,95 @@ static SDL_bool bHasNewData;
|
||||
|
||||
static SDL_bool bHasEnvironmentVariables = SDL_FALSE;
|
||||
|
||||
|
||||
static int Android_JNI_SetEnv(JNIEnv *env);
|
||||
|
||||
/*******************************************************************************
|
||||
Functions called by JNI
|
||||
*******************************************************************************/
|
||||
|
||||
/* From http://developer.android.com/guide/practices/jni.html
|
||||
* All threads are Linux threads, scheduled by the kernel.
|
||||
* They're usually started from managed code (using Thread.start), but they can also be created elsewhere and then
|
||||
* attached to the JavaVM. For example, a thread started with pthread_create can be attached with the
|
||||
* JNI AttachCurrentThread or AttachCurrentThreadAsDaemon functions. Until a thread is attached, it has no JNIEnv,
|
||||
* and cannot make JNI calls.
|
||||
* Attaching a natively-created thread causes a java.lang.Thread object to be constructed and added to the "main"
|
||||
* ThreadGroup, making it visible to the debugger. Calling AttachCurrentThread on an already-attached thread
|
||||
* is a no-op.
|
||||
* Note: You can call this function any number of times for the same thread, there's no harm in it
|
||||
*/
|
||||
|
||||
/* From http://developer.android.com/guide/practices/jni.html
|
||||
* Threads attached through JNI must call DetachCurrentThread before they exit. If coding this directly is awkward,
|
||||
* in Android 2.0 (Eclair) and higher you can use pthread_key_create to define a destructor function that will be
|
||||
* called before the thread exits, and call DetachCurrentThread from there. (Use that key with pthread_setspecific
|
||||
* to store the JNIEnv in thread-local-storage; that way it'll be passed into your destructor as the argument.)
|
||||
* Note: The destructor is not called unless the stored value is != NULL
|
||||
* Note: You can call this function any number of times for the same thread, there's no harm in it
|
||||
* (except for some lost CPU cycles)
|
||||
*/
|
||||
|
||||
/* Set local storage value */
|
||||
static int
|
||||
Android_JNI_SetEnv(JNIEnv *env) {
|
||||
int status = pthread_setspecific(mThreadKey, env);
|
||||
if (status < 0) {
|
||||
__android_log_print(ANDROID_LOG_ERROR, "SDL", "Failed pthread_setspecific() in Android_JNI_SetEnv() (err=%d)", status);
|
||||
}
|
||||
return status;
|
||||
}
|
||||
|
||||
/* Get local storage value */
|
||||
JNIEnv* Android_JNI_GetEnv(void)
|
||||
{
|
||||
/* Get JNIEnv from the Thread local storage */
|
||||
JNIEnv *env = pthread_getspecific(mThreadKey);
|
||||
if (env == NULL) {
|
||||
__android_log_print(ANDROID_LOG_ERROR, "SDL", "JNIEnv is NULL. Call Android_JNI_SetupThread() first.");
|
||||
}
|
||||
|
||||
return env;
|
||||
}
|
||||
|
||||
/* Set up an external thread for using JNI with Android_JNI_GetEnv() */
|
||||
int Android_JNI_SetupThread(void)
|
||||
{
|
||||
JNIEnv *env;
|
||||
int status;
|
||||
|
||||
/* There should be a JVM */
|
||||
if (mJavaVM == NULL) {
|
||||
__android_log_print(ANDROID_LOG_ERROR, "SDL", "Failed, there is no JavaVM");
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Attach the current thread to the JVM and get a JNIEnv.
|
||||
* It will be detached by pthread_create destructor 'Android_JNI_ThreadDestroyed' */
|
||||
status = (*mJavaVM)->AttachCurrentThread(mJavaVM, &env, NULL);
|
||||
if (status < 0) {
|
||||
__android_log_print(ANDROID_LOG_ERROR, "SDL", "Failed to attach current thread (err=%d)", status);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Save JNIEnv into the Thread local storage */
|
||||
if (Android_JNI_SetEnv(env) < 0) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* Destructor called for each thread where mThreadKey is not NULL */
|
||||
static void
|
||||
Android_JNI_ThreadDestroyed(void *value)
|
||||
{
|
||||
/* The thread is being destroyed, detach it from the Java VM and set the mThreadKey value to NULL as required */
|
||||
JNIEnv *env = (JNIEnv *) value;
|
||||
if (env != NULL) {
|
||||
(*mJavaVM)->DetachCurrentThread(mJavaVM);
|
||||
Android_JNI_SetEnv(NULL);
|
||||
}
|
||||
}
|
||||
|
||||
/* Creation of local storage mThreadKey */
|
||||
static void
|
||||
Android_JNI_CreateKey()
|
||||
{
|
||||
@ -888,7 +963,7 @@ JNIEXPORT void JNICALL SDL_JAVA_INTERFACE(nativeQuit)(
|
||||
|
||||
str = SDL_GetError();
|
||||
if (str && str[0]) {
|
||||
__android_log_print(ANDROID_LOG_VERBOSE, "SDL", "SDLActivity thread ends (error=%s)", str);
|
||||
__android_log_print(ANDROID_LOG_ERROR, "SDL", "SDLActivity thread ends (error=%s)", str);
|
||||
} else {
|
||||
__android_log_print(ANDROID_LOG_VERBOSE, "SDL", "SDLActivity thread ends");
|
||||
}
|
||||
@ -1141,87 +1216,6 @@ SDL_bool Android_JNI_GetAccelerometerValues(float values[3])
|
||||
return retval;
|
||||
}
|
||||
|
||||
static void Android_JNI_ThreadDestroyed(void *value)
|
||||
{
|
||||
/* The thread is being destroyed, detach it from the Java VM and set the mThreadKey value to NULL as required */
|
||||
JNIEnv *env = (JNIEnv *) value;
|
||||
if (env != NULL) {
|
||||
(*mJavaVM)->DetachCurrentThread(mJavaVM);
|
||||
Android_JNI_SetEnv(NULL);
|
||||
}
|
||||
}
|
||||
|
||||
static int Android_JNI_SetEnv(JNIEnv *env) {
|
||||
int status = pthread_setspecific(mThreadKey, env);
|
||||
if (status < 0) {
|
||||
__android_log_print(ANDROID_LOG_ERROR, "SDL", "Failed pthread_setspecific() in Android_JNI_SetEnv() (err=%d)", status);
|
||||
}
|
||||
return status;
|
||||
}
|
||||
|
||||
JNIEnv* Android_JNI_GetEnv(void)
|
||||
{
|
||||
/* From http://developer.android.com/guide/practices/jni.html
|
||||
* All threads are Linux threads, scheduled by the kernel.
|
||||
* They're usually started from managed code (using Thread.start), but they can also be created elsewhere and then
|
||||
* attached to the JavaVM. For example, a thread started with pthread_create can be attached with the
|
||||
* JNI AttachCurrentThread or AttachCurrentThreadAsDaemon functions. Until a thread is attached, it has no JNIEnv,
|
||||
* and cannot make JNI calls.
|
||||
* Attaching a natively-created thread causes a java.lang.Thread object to be constructed and added to the "main"
|
||||
* ThreadGroup, making it visible to the debugger. Calling AttachCurrentThread on an already-attached thread
|
||||
* is a no-op.
|
||||
* Note: You can call this function any number of times for the same thread, there's no harm in it
|
||||
*/
|
||||
|
||||
/* From http://developer.android.com/guide/practices/jni.html
|
||||
* Threads attached through JNI must call DetachCurrentThread before they exit. If coding this directly is awkward,
|
||||
* in Android 2.0 (Eclair) and higher you can use pthread_key_create to define a destructor function that will be
|
||||
* called before the thread exits, and call DetachCurrentThread from there. (Use that key with pthread_setspecific
|
||||
* to store the JNIEnv in thread-local-storage; that way it'll be passed into your destructor as the argument.)
|
||||
* Note: The destructor is not called unless the stored value is != NULL
|
||||
* Note: You can call this function any number of times for the same thread, there's no harm in it
|
||||
* (except for some lost CPU cycles)
|
||||
*/
|
||||
|
||||
|
||||
|
||||
/* Get JNIEnv from the Thread local storage */
|
||||
JNIEnv *env = pthread_getspecific(mThreadKey);
|
||||
if (env == NULL) {
|
||||
__android_log_print(ANDROID_LOG_ERROR, "SDL", "JNIEnv is NULL. Call Android_JNI_SetupThread() first.");
|
||||
}
|
||||
|
||||
return env;
|
||||
}
|
||||
|
||||
int Android_JNI_SetupThread(void)
|
||||
{
|
||||
JNIEnv *env;
|
||||
int status;
|
||||
|
||||
/* There should be a JVM */
|
||||
if (mJavaVM == NULL) {
|
||||
__android_log_print(ANDROID_LOG_ERROR, "SDL", "Failed, there is no JavaVM");
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Attach the current thread to the JVM and get a JNIEnv.
|
||||
* It will be detached by pthread_create destructor 'Android_JNI_ThreadDestroyed'
|
||||
*/
|
||||
status = (*mJavaVM)->AttachCurrentThread(mJavaVM, &env, NULL);
|
||||
if (status < 0) {
|
||||
__android_log_print(ANDROID_LOG_ERROR, "SDL", "Failed to attach current thread (err=%d)", status);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Save JNIEnv into the Thread local storage */
|
||||
if (Android_JNI_SetEnv(env) < 0) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
/*
|
||||
* Audio support
|
||||
*/
|
||||
|
||||
Loading…
Reference in New Issue
Block a user