android.c

 
#include "android.h"
#include <jni.h>
 
#include <winpr/winpr.h>
#include <winpr/assert.h>
 
#include "../log.h"
 
#define TAG WINPR_TAG("android")
 
JavaVM* jniVm = NULL;
 
WINPR_API jint JNI_OnLoad(JavaVM* vm, void* reserved)
{
  WLog_INFO(TAG, "Setting up JNI environment...");
 
  jniVm = vm;
  return JNI_VERSION_1_6;
}
 
WINPR_API void JNICALL JNI_OnUnload(JavaVM* vm, void* reserved)
{
  JNIEnv* env = NULL;
  WLog_INFO(TAG, "Tearing down JNI environment...");
 
  if ((*jniVm)->GetEnv(vm, (void**)&env, JNI_VERSION_1_6) != JNI_OK)
  {
    WLog_FATAL(TAG, "Failed to get the environment");
    return;
  }
}
 
jboolean winpr_jni_attach_thread(JNIEnv** env)
{
  WINPR_ASSERT(jniVm);
 
  if ((*jniVm)->GetEnv(jniVm, (void**)env, JNI_VERSION_1_4) != JNI_OK)
  {
    WLog_INFO(TAG, "android_java_callback: attaching current thread");
    (*jniVm)->AttachCurrentThread(jniVm, env, NULL);
 
    if ((*jniVm)->GetEnv(jniVm, (void**)env, JNI_VERSION_1_4) != JNI_OK)
    {
      WLog_ERR(TAG, "android_java_callback: failed to obtain current JNI environment");
    }
 
    return JNI_TRUE;
  }
 
  return JNI_FALSE;
}
 
/* attach current thread to JVM */
void winpr_jni_detach_thread(void)
{
  WINPR_ASSERT(jniVm);
  (*jniVm)->DetachCurrentThread(jniVm);
}