facebook::yoga::vanillajni 命名空间参考

类
class	LayoutContext
class	ScopedGlobalRef
class	ScopedLocalRef
class	YogaJniException

函数
void	registerNatives (JNIEnv *env, const char *className, const JNINativeMethod methods[], size_t numMethods)
jmethodID	getStaticMethodId (JNIEnv *env, jclass clazz, const char *methodName, const char *methodDescriptor)
jmethodID	getMethodId (JNIEnv *env, jclass clazz, const char *methodName, const char *methodDescriptor)
jfieldID	getFieldId (JNIEnv *env, jclass clazz, const char *fieldName, const char *fieldSignature)
	DEFINE_CALL_METHOD_FOR_PRIMITIVE_IMPLEMENTATION (jlong, Long)
	DEFINE_CALL_METHOD_FOR_PRIMITIVE_IMPLEMENTATION (jfloat, Float)
	DEFINE_CALL_METHOD_FOR_PRIMITIVE_INTERFACE (void, Void)
ScopedLocalRef< jobject >	callStaticObjectMethod (JNIEnv *env, jclass clazz, jmethodID methodId,...)
ScopedGlobalRef< jobject >	newGlobalRef (JNIEnv *env, jobject obj)
	DEFINE_CALL_METHOD_FOR_PRIMITIVE_INTERFACE (jlong, Long)
	DEFINE_CALL_METHOD_FOR_PRIMITIVE_INTERFACE (jfloat, Float)
jint	ensureInitialized (JNIEnv **env, JavaVM *vm)
JNIEXPORT JNIEnv *	getCurrentEnv ()
void	logErrorMessageAndDie (const char *message)
void	assertNoPendingJniException (JNIEnv *env)
void	assertNoPendingJniExceptionIf (JNIEnv *env, bool condition)
template<typename T >
ScopedGlobalRef< T >	make_global_ref (T globalRef)
template<typename T >
ScopedLocalRef< T >	make_local_ref (JNIEnv *env, T localRef)

详细描述

This is a modified version of Android's ScopedLocalRef class that can be found in the Android's JNI code.

函数说明

assertNoPendingJniException()

void facebook::yoga::vanillajni::assertNoPendingJniException

(

JNIEnv *

env

)

Checks whether there is a pending JNI exception. If so, it logs an error message and aborts the current process. Otherwise it does nothing.

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assertNoPendingJniExceptionIf()

void facebook::yoga::vanillajni::assertNoPendingJniExceptionIf	(	JNIEnv *	env,
		bool	condition )

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callStaticObjectMethod()

ScopedLocalRef< jobject > facebook::yoga::vanillajni::callStaticObjectMethod	(	JNIEnv *	env,
		jclass	clazz,
		jmethodID	methodId,
			... )

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DEFINE_CALL_METHOD_FOR_PRIMITIVE_IMPLEMENTATION() [1/2]

facebook::yoga::vanillajni::DEFINE_CALL_METHOD_FOR_PRIMITIVE_IMPLEMENTATION	(	jfloat	,
		Float	)

DEFINE_CALL_METHOD_FOR_PRIMITIVE_IMPLEMENTATION() [2/2]

facebook::yoga::vanillajni::DEFINE_CALL_METHOD_FOR_PRIMITIVE_IMPLEMENTATION	(	jlong	,
		Long	)

DEFINE_CALL_METHOD_FOR_PRIMITIVE_INTERFACE() [1/3]

facebook::yoga::vanillajni::DEFINE_CALL_METHOD_FOR_PRIMITIVE_INTERFACE	(	jfloat	,
		Float	)

DEFINE_CALL_METHOD_FOR_PRIMITIVE_INTERFACE() [2/3]

facebook::yoga::vanillajni::DEFINE_CALL_METHOD_FOR_PRIMITIVE_INTERFACE	(	jlong	,
		Long	)

DEFINE_CALL_METHOD_FOR_PRIMITIVE_INTERFACE() [3/3]

facebook::yoga::vanillajni::DEFINE_CALL_METHOD_FOR_PRIMITIVE_INTERFACE	(	void	,
		Void	)

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ensureInitialized()

jint facebook::yoga::vanillajni::ensureInitialized	(	JNIEnv **	env,
		JavaVM *	vm )

This method has to be called before using the vanillajni library. This method is typically called when doing initialization in the "on load" JNI hook of a particular library.

This method is thread safe, and after the first time it's called it has no initialization effect.

参数

env	use this output parameter to get a JNIEnv to use for things such as registering native methods and such.
vm	the VM instance passed by JNI. This is usually the VM instance that is passed to the "on load" JNI hook.

返回

an integer value to return from the "on load" hook.

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getCurrentEnv()

JNIEnv * facebook::yoga::vanillajni::getCurrentEnv

(

)

Returns a JNIEnv* suitable for the current thread. If the current thread is not attached to the Java VM, this method aborts execution.

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getFieldId()

jfieldID facebook::yoga::vanillajni::getFieldId	(	JNIEnv *	env,
		jclass	clazz,
		const char *	fieldName,
		const char *	fieldSignature )

Returns a class non-static field ID. Aborts if any error happens.

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getMethodId()

jmethodID facebook::yoga::vanillajni::getMethodId	(	JNIEnv *	env,
		jclass	clazz,
		const char *	methodName,
		const char *	methodDescriptor )

Returns a jmethodID for a class non-static method. Aborts if any error happens.

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getStaticMethodId()

jmethodID facebook::yoga::vanillajni::getStaticMethodId	(	JNIEnv *	env,
		jclass	clazz,
		const char *	methodName,
		const char *	methodDescriptor )

Returns a jmethodID for a class static method. Aborts if any error happens.

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logErrorMessageAndDie()

void facebook::yoga::vanillajni::logErrorMessageAndDie

(

const char *

message

)

Logs an error message and aborts the current process.

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make_global_ref()

template<typename T >

ScopedGlobalRef< T > facebook::yoga::vanillajni::make_global_ref

(

T

globalRef

)

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make_local_ref()

template<typename T >

ScopedLocalRef< T > facebook::yoga::vanillajni::make_local_ref	(	JNIEnv *	env,
		T	localRef )

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newGlobalRef()

ScopedGlobalRef< jthrowable > facebook::yoga::vanillajni::newGlobalRef	(	JNIEnv *	env,
		jobject	obj )

Given a local or a global reference, this method creates a new global reference out of it. If any error happens, aborts the process.

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registerNatives()

void facebook::yoga::vanillajni::registerNatives	(	JNIEnv *	env,
		const char *	className,
		const JNINativeMethod	methods[],
		size_t	numMethods )

Registers a set of methods for a JNI class. Aborts if registration fails.

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