tools/android/webgpu/src/main/cpp/JNIContext.cpp

// Copyright 2024 The Dawn & Tint Authors
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#include "JNIContext.h"

namespace dawn::kotlin_api {

JNIContext::JNIContext(JNIEnv* env) : env(env) {}

JNIContext::~JNIContext() {
    for (auto [s, utf] : mStringsToRelease) {
        env->ReleaseStringUTFChars(s, utf);
    }

    // Free int arrays with JNI_ABORT because we never modify their contents and don't need to copy
    // modifications back in the JVM's array (if a copy was done in GetIntArrayElements).
    for (auto [array, ints] : mIntArraysToRelease) {
        env->ReleaseIntArrayElements(array, ints, JNI_ABORT);
    }

    for (auto allocation : mAllocationsToFree) {
        delete allocation;
    }
    for (auto allocation : mArrayAllocationsToFree) {
        delete[] allocation;
    }
}

const char* JNIContext::GetStringUTFChars(jstring s) {
    const char* utf = env->GetStringUTFChars(s, nullptr);
    mStringsToRelease.emplace_back(s, utf);
    return utf;
}

const jint* JNIContext::GetIntArrayElements(jintArray a) {
    jint* ints = env->GetIntArrayElements(a, nullptr);
    mIntArraysToRelease.emplace_back(a, ints);
    return ints;
}

}  // namespace dawn::kotlin_api