51 // external_guard is true if called from resolve_external_guard. 52 template <DecoratorSet decorators, bool external_guard> 53 inline oop JNIHandles::resolve_impl(jobject handle) { 54 assert(handle != NULL, "precondition"); 55 assert(!current_thread_in_native(), "must not be in native"); 56 oop result; 57 if (is_jweak(handle)) { // Unlikely 58 result = NativeAccess<ON_PHANTOM_OOP_REF|decorators>::oop_load(jweak_ptr(handle)); 59 } else { 60 result = NativeAccess<decorators>::oop_load(jobject_ptr(handle)); 61 // Construction of jobjects canonicalize a null value into a null 62 // jobject, so for non-jweak the pointee should never be null. 63 assert(external_guard || result != NULL, "Invalid JNI handle"); 64 } 65 return result; 66 } 67 68 inline oop JNIHandles::resolve(jobject handle) { 69 oop result = NULL; 70 if (handle != NULL) { 71 result = resolve_impl<0 /* decorators */, false /* external_guard */>(handle); 72 } 73 return result; 74 } 75 76 inline oop JNIHandles::resolve_no_keepalive(jobject handle) { 77 oop result = NULL; 78 if (handle != NULL) { 79 result = resolve_impl<AS_NO_KEEPALIVE, false /* external_guard */>(handle); 80 } 81 return result; 82 } 83 84 inline bool JNIHandles::is_same_object(jobject handle1, jobject handle2) { 85 oop obj1 = resolve_no_keepalive(handle1); 86 oop obj2 = resolve_no_keepalive(handle2); 87 return oopDesc::equals(obj1, obj2); 88 } 89 90 inline oop JNIHandles::resolve_non_null(jobject handle) { 91 assert(handle != NULL, "JNI handle should not be null"); 92 oop result = resolve_impl<0 /* decorators */, false /* external_guard */>(handle); 93 assert(result != NULL, "NULL read from jni handle"); 94 return result; 95 } 96 97 inline void JNIHandles::destroy_local(jobject handle) { 98 if (handle != NULL) { 99 assert(!is_jweak(handle), "Invalid JNI local handle"); 100 NativeAccess<>::oop_store(jobject_ptr(handle), (oop)NULL); 101 } 102 } 103 104 #endif // SHARE_RUNTIME_JNIHANDLES_INLINE_HPP 105 | 51 // external_guard is true if called from resolve_external_guard. 52 template <DecoratorSet decorators, bool external_guard> 53 inline oop JNIHandles::resolve_impl(jobject handle) { 54 assert(handle != NULL, "precondition"); 55 assert(!current_thread_in_native(), "must not be in native"); 56 oop result; 57 if (is_jweak(handle)) { // Unlikely 58 result = NativeAccess<ON_PHANTOM_OOP_REF|decorators>::oop_load(jweak_ptr(handle)); 59 } else { 60 result = NativeAccess<decorators>::oop_load(jobject_ptr(handle)); 61 // Construction of jobjects canonicalize a null value into a null 62 // jobject, so for non-jweak the pointee should never be null. 63 assert(external_guard || result != NULL, "Invalid JNI handle"); 64 } 65 return result; 66 } 67 68 inline oop JNIHandles::resolve(jobject handle) { 69 oop result = NULL; 70 if (handle != NULL) { 71 result = resolve_impl<DECORATORS_NONE, false /* external_guard */>(handle); 72 } 73 return result; 74 } 75 76 inline oop JNIHandles::resolve_no_keepalive(jobject handle) { 77 oop result = NULL; 78 if (handle != NULL) { 79 result = resolve_impl<AS_NO_KEEPALIVE, false /* external_guard */>(handle); 80 } 81 return result; 82 } 83 84 inline bool JNIHandles::is_same_object(jobject handle1, jobject handle2) { 85 oop obj1 = resolve_no_keepalive(handle1); 86 oop obj2 = resolve_no_keepalive(handle2); 87 return oopDesc::equals(obj1, obj2); 88 } 89 90 inline oop JNIHandles::resolve_non_null(jobject handle) { 91 assert(handle != NULL, "JNI handle should not be null"); 92 oop result = resolve_impl<DECORATORS_NONE, false /* external_guard */>(handle); 93 assert(result != NULL, "NULL read from jni handle"); 94 return result; 95 } 96 97 inline void JNIHandles::destroy_local(jobject handle) { 98 if (handle != NULL) { 99 assert(!is_jweak(handle), "Invalid JNI local handle"); 100 NativeAccess<>::oop_store(jobject_ptr(handle), (oop)NULL); 101 } 102 } 103 104 #endif // SHARE_RUNTIME_JNIHANDLES_INLINE_HPP 105 |