81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
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/*
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* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef MODULES_UTILITY_INCLUDE_HELPERS_ANDROID_H_
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#define MODULES_UTILITY_INCLUDE_HELPERS_ANDROID_H_
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#include <jni.h>
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#include <string>
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#include "rtc_base/system/arch.h"
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// Abort the process if |jni| has a Java exception pending.
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// TODO(henrika): merge with CHECK_JNI_EXCEPTION() in jni_helpers.h.
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#define CHECK_EXCEPTION(jni) \
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RTC_CHECK(!jni->ExceptionCheck()) \
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<< (jni->ExceptionDescribe(), jni->ExceptionClear(), "")
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#if defined(WEBRTC_ARCH_X86)
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// Dalvik JIT generated code doesn't guarantee 16-byte stack alignment on
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// x86 - use force_align_arg_pointer to realign the stack at the JNI
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// boundary. bugs.webrtc.org/9050
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#define JNI_FUNCTION_ALIGN __attribute__((force_align_arg_pointer))
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#else
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#define JNI_FUNCTION_ALIGN
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#endif
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namespace webrtc {
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// Return a |JNIEnv*| usable on this thread or NULL if this thread is detached.
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JNIEnv* GetEnv(JavaVM* jvm);
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// Return a |jlong| that will correctly convert back to |ptr|. This is needed
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// because the alternative (of silently passing a 32-bit pointer to a vararg
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// function expecting a 64-bit param) picks up garbage in the high 32 bits.
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jlong PointerTojlong(void* ptr);
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// JNIEnv-helper methods that wraps the API which uses the JNI interface
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// pointer (JNIEnv*). It allows us to RTC_CHECK success and that no Java
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// exception is thrown while calling the method.
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jmethodID GetMethodID(JNIEnv* jni,
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jclass c,
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const char* name,
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const char* signature);
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jmethodID GetStaticMethodID(JNIEnv* jni,
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jclass c,
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const char* name,
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const char* signature);
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jclass FindClass(JNIEnv* jni, const char* name);
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jobject NewGlobalRef(JNIEnv* jni, jobject o);
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void DeleteGlobalRef(JNIEnv* jni, jobject o);
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// Attach thread to JVM if necessary and detach at scope end if originally
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// attached.
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class AttachThreadScoped {
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public:
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explicit AttachThreadScoped(JavaVM* jvm);
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~AttachThreadScoped();
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JNIEnv* env();
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private:
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bool attached_;
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JavaVM* jvm_;
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JNIEnv* env_;
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};
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} // namespace webrtc
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#endif // MODULES_UTILITY_INCLUDE_HELPERS_ANDROID_H_
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