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/*
* Author: Henry Bruce <henry.bruce@intel.com>
* Copyright (c) 2016 Intel Corporation.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <pthread.h>
#include "java/mraajni.h"
static pthread_key_t env_key;
static pthread_once_t env_key_init = PTHREAD_ONCE_INIT;
static jmethodID runGlobal;
static JavaVM* globVM = NULL;
void
mraa_java_set_jvm(JavaVM* vm)
{
globVM = vm;
}
static void
mraa_java_make_env_key(void)
{
if (globVM != NULL) {
JNIEnv* jenv;
(*globVM)->GetEnv(globVM, (void**) &jenv, JNI_REQUIRED_VERSION);
jclass rcls = (*jenv)->FindClass(jenv, "java/lang/Runnable");
jmethodID runm = (*jenv)->GetMethodID(jenv, rcls, "run", "()V");
runGlobal = (jmethodID)(*jenv)->NewGlobalRef(jenv, (jobject) runm);
pthread_key_create(&env_key, NULL);
}
}
void
mraa_java_isr_callback(void* data)
{
JNIEnv* jenv = (JNIEnv*) pthread_getspecific(env_key);
(*jenv)->CallVoidMethod(jenv, (jobject) data, runGlobal);
}
mraa_result_t
mraa_java_attach_thread()
{
if (globVM != NULL) {
JNIEnv* jenv;
jint err = (*globVM)->AttachCurrentThreadAsDaemon(globVM, (void**) &jenv, NULL);
if (err == JNI_OK) {
pthread_once(&env_key_init, mraa_java_make_env_key);
pthread_setspecific(env_key, jenv);
return MRAA_SUCCESS;
}
}
return MRAA_ERROR_UNSPECIFIED;
}
void
mraa_java_detach_thread()
{
if (globVM != NULL)
(*globVM)->DetachCurrentThread(globVM);
}
void*
mraa_java_create_global_ref(void* args)
{
if (globVM != NULL) {
JNIEnv* jenv;
(*globVM)->GetEnv(globVM, (void**) &jenv, JNI_REQUIRED_VERSION);
jobject grunnable = (*jenv)->NewGlobalRef(jenv, (jobject) args);
return (void*) grunnable;
} else
return NULL;
}
void
mraa_java_delete_global_ref(void* ref)
{
if (globVM != NULL) {
JNIEnv* jenv;
(*globVM)->GetEnv(globVM, (void**) &jenv, JNI_REQUIRED_VERSION);
(*jenv)->DeleteGlobalRef(jenv, (jobject) ref);
}
}
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