android_translation_layer/src/api-impl-jni/defines.h

#ifndef _DEFINES_H_
#define _DEFINES_H_

#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))

#define DEG2RAD(deg) ((deg) * M_PI / 180)

#define __likely__(x) __builtin_expect(x, 1)
#define __unlikely__(x) __builtin_expect(x, 0)

// these macros are a bit hacky, since they deliberately assume that env exists and refers to the JNI env

#define _PTR(ptr)((void*)(intptr_t)(ptr))
#define _INTPTR(ptr)((jlong)(intptr_t)(ptr))
#define _REF(obj)((*env)->NewGlobalRef(env, obj))
#define _UNREF(obj)((*env)->DeleteGlobalRef(env, obj))
#define _WEAK_REF(obj)((*env)->NewWeakGlobalRef(env, obj))
#define _WEAK_UNREF(obj)((*env)->DeleteWeakGlobalRef(env, obj))
#define _CLASS(object) ((*env)->GetObjectClass(env, object))
#define _SUPER(object) ((*env)->GetSuperclass(env, object))
#define _METHOD(class, method, attrs) ((*env)->GetMethodID(env, class, method, attrs))
#define _STATIC_METHOD(class, method, attrs) ((*env)->GetStaticMethodID(env, class, method, attrs))
#define _JSTRING(cstring) ((*env)->NewStringUTF(env, cstring))
#define _CSTRING(jstring) ((*env)->GetStringUTFChars(env, jstring, NULL))
#define _FIELD_ID(class, field, type) ((*env)->GetFieldID(env, class , field, type))
#define _STATIC_FIELD_ID(class, field, type) ((*env)->GetStaticFieldID(env, class , field, type))
#define _SET_OBJ_FIELD(object, field, type, value) ((*env)->SetObjectField(env, object, _FIELD_ID(_CLASS(object), field, type), value))
#define _GET_OBJ_FIELD(object, field, type) ((*env)->GetObjectField(env, object, _FIELD_ID(_CLASS(object), field, type)))
#define _SET_LONG_FIELD(object, field, value) ((*env)->SetLongField(env, object, _FIELD_ID(_CLASS(object), field, "J"), value))
#define _GET_LONG_FIELD(object, field) ((*env)->GetLongField(env, object, _FIELD_ID(_CLASS(object), field, "J")))
#define _SET_INT_FIELD(object, field, value) ((*env)->SetIntField(env, object, _FIELD_ID(_CLASS(object), field, "I"), value))
#define _GET_INT_FIELD(object, field) ((*env)->GetIntField(env, object, _FIELD_ID(_CLASS(object), field, "I")))
#define _SET_BOOL_FIELD(object, field, value) ((*env)->SetBooleanField(env, object, _FIELD_ID(_CLASS(object), field, "Z"), value))
#define _GET_BOOL_FIELD(object, field) ((*env)->GetBooleanField(env, object, _FIELD_ID(_CLASS(object), field, "Z")))
#define _GET_FLOAT_FIELD(object, field) ((*env)->GetFloatField(env, object, _FIELD_ID(_CLASS(object), field, "F")))
#define _SET_FLOAT_FIELD(object, field, value) ((*env)->SetFloatField(env, object, _FIELD_ID(_CLASS(object), field, "F"), value))
#define _SET_STATIC_INT_FIELD(class, field, value) ((*env)->SetStaticIntField(env, class, _STATIC_FIELD_ID(class, field, "I"), value))
#define _SET_STATIC_BOOL_FIELD(class, field, value) ((*env)->SetStaticBooleanField(env, class, _STATIC_FIELD_ID(class, field, "Z"), value))
#define _SET_STATIC_OBJ_FIELD(class, field, type, value) ((*env)->SetStaticObjectField(env, class, _STATIC_FIELD_ID(class, field, type), value))
#define _GET_STATIC_OBJ_FIELD(class, field, type) ((*env)->GetStaticObjectField(env, class, _STATIC_FIELD_ID(class, field, type)))
#define _GET_BYTE_ARRAY_ELEMENTS(b_array) ((*env)->GetByteArrayElements(env, b_array, NULL))
#define _RELEASE_BYTE_ARRAY_ELEMENTS(b_array, buffer_ptr) ((*env)->ReleaseByteArrayElements(env, b_array, buffer_ptr, 0))

// token pasting with macro expansion

#define __JOIN(x, y) x ## y
#define JOIN(x, y) __JOIN(x, y)
#define JOIN3(x, y, z) JOIN(JOIN(x, y), z)

// define enum member value to a value from autogenerated header

#define JAVA_ENUM(name) \
	name = JOIN3(JAVA_ENUM_CLASS, _, name)

#endif