diff options
Diffstat (limited to 'devtools/swigwin-1.3.34/Lib/java/director.swg')
| -rw-r--r-- | devtools/swigwin-1.3.34/Lib/java/director.swg | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/devtools/swigwin-1.3.34/Lib/java/director.swg b/devtools/swigwin-1.3.34/Lib/java/director.swg new file mode 100644 index 0000000..bade80c --- /dev/null +++ b/devtools/swigwin-1.3.34/Lib/java/director.swg @@ -0,0 +1,185 @@ +/* ----------------------------------------------------------------------------- + * See the LICENSE file for information on copyright, usage and redistribution + * of SWIG, and the README file for authors - http://www.swig.org/release.html. + * + * director.swg + * + * This file contains support for director classes that proxy + * method calls from C++ to Java extensions. + * ----------------------------------------------------------------------------- */ + +#ifdef __cplusplus + +#if defined(DEBUG_DIRECTOR_OWNED) +#include <iostream> +#endif + +namespace Swig { + /* Java object wrapper */ + class JObjectWrapper { + public: + JObjectWrapper() : jthis_(NULL), weak_global_(true) { + } + + ~JObjectWrapper() { + jthis_ = NULL; + weak_global_ = true; + } + + bool set(JNIEnv *jenv, jobject jobj, bool mem_own, bool weak_global) { + if (!jthis_) { + weak_global_ = weak_global; + if (jobj) + jthis_ = ((weak_global_ || !mem_own) ? jenv->NewWeakGlobalRef(jobj) : jenv->NewGlobalRef(jobj)); +#if defined(DEBUG_DIRECTOR_OWNED) + std::cout << "JObjectWrapper::set(" << jobj << ", " << (weak_global ? "weak_global" : "global_ref") << ") -> " << jthis_ << std::endl; +#endif + return true; + } else { +#if defined(DEBUG_DIRECTOR_OWNED) + std::cout << "JObjectWrapper::set(" << jobj << ", " << (weak_global ? "weak_global" : "global_ref") << ") -> already set" << std::endl; +#endif + return false; + } + } + + jobject get(JNIEnv *jenv) const { +#if defined(DEBUG_DIRECTOR_OWNED) + std::cout << "JObjectWrapper::get("; + if (jthis_) + std::cout << jthis_; + else + std::cout << "null"; + std::cout << ") -> return new local ref" << std::endl; +#endif + return (jthis_ ? jenv->NewLocalRef(jthis_) : jthis_); + } + + void release(JNIEnv *jenv) { +#if defined(DEBUG_DIRECTOR_OWNED) + std::cout << "JObjectWrapper::release(" << jthis_ << "): " << (weak_global_ ? "weak global ref" : "global ref") << std::endl; +#endif + if (jthis_) { + if (weak_global_) { + if (jenv->IsSameObject(jthis_, NULL) == JNI_FALSE) + jenv->DeleteWeakGlobalRef((jweak)jthis_); + } else + jenv->DeleteGlobalRef(jthis_); + } + + jthis_ = NULL; + weak_global_ = true; + } + + jobject peek() { + return jthis_; + } + + /* Java proxy releases ownership of C++ object, C++ object is now + responsible for destruction (creates NewGlobalRef to pin Java + proxy) */ + void java_change_ownership(JNIEnv *jenv, jobject jself, bool take_or_release) { + if (take_or_release) { /* Java takes ownership of C++ object's lifetime. */ + if (!weak_global_) { + jenv->DeleteGlobalRef(jthis_); + jthis_ = jenv->NewWeakGlobalRef(jself); + weak_global_ = true; + } + } else { /* Java releases ownership of C++ object's lifetime */ + if (weak_global_) { + jenv->DeleteWeakGlobalRef((jweak)jthis_); + jthis_ = jenv->NewGlobalRef(jself); + weak_global_ = false; + } + } + } + + private: + /* pointer to Java object */ + jobject jthis_; + /* Local or global reference flag */ + bool weak_global_; + }; + + /* director base class */ + class Director { + /* pointer to Java virtual machine */ + JavaVM *swig_jvm_; + + protected: +#if defined (_MSC_VER) && (_MSC_VER<1300) + class JNIEnvWrapper; + friend class JNIEnvWrapper; +#endif + /* Utility class for managing the JNI environment */ + class JNIEnvWrapper { + const Director *director_; + JNIEnv *jenv_; + public: + JNIEnvWrapper(const Director *director) : director_(director), jenv_(0) { + director_->swig_jvm_->AttachCurrentThread((void **) &jenv_, NULL); + } + ~JNIEnvWrapper() { +// Some JVMs, eg JDK 1.4.2 and lower on Solaris have a bug and crash with the DetachCurrentThread call. +// However, without this call, the JVM hangs on exit when the thread was not created by the JVM and creates a memory leak. +#if !defined(SWIG_JAVA_NO_DETACH_CURRENT_THREAD) + director_->swig_jvm_->DetachCurrentThread(); +#endif + } + JNIEnv *getJNIEnv() const { + return jenv_; + } + }; + + /* Java object wrapper */ + JObjectWrapper swig_self_; + + /* Disconnect director from Java object */ + void swig_disconnect_director_self(const char *disconn_method) { + JNIEnvWrapper jnienv(this) ; + JNIEnv *jenv = jnienv.getJNIEnv() ; + jobject jobj = swig_self_.peek(); +#if defined(DEBUG_DIRECTOR_OWNED) + std::cout << "Swig::Director::disconnect_director_self(" << jobj << ")" << std::endl; +#endif + if (jobj && jenv->IsSameObject(jobj, NULL) == JNI_FALSE) { + jmethodID disconn_meth = jenv->GetMethodID(jenv->GetObjectClass(jobj), disconn_method, "()V"); + if (disconn_meth) { +#if defined(DEBUG_DIRECTOR_OWNED) + std::cout << "Swig::Director::disconnect_director_self upcall to " << disconn_method << std::endl; +#endif + jenv->CallVoidMethod(jobj, disconn_meth); + } + } + } + + public: + Director(JNIEnv *jenv) : swig_jvm_((JavaVM *) NULL), swig_self_() { + /* Acquire the Java VM pointer */ + jenv->GetJavaVM(&swig_jvm_); + } + + virtual ~Director() { + JNIEnvWrapper jnienv(this) ; + JNIEnv *jenv = jnienv.getJNIEnv() ; + swig_self_.release(jenv); + } + + bool swig_set_self(JNIEnv *jenv, jobject jself, bool mem_own, bool weak_global) { + return swig_self_.set(jenv, jself, mem_own, weak_global); + } + + jobject swig_get_self(JNIEnv *jenv) const { + return swig_self_.get(jenv); + } + + // Change C++ object's ownership, relative to Java + void swig_java_change_ownership(JNIEnv *jenv, jobject jself, bool take_or_release) { + swig_self_.java_change_ownership(jenv, jself, take_or_release); + } + }; +} + +#endif /* __cplusplus */ + + |