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vii
3062909209
GetMethodID maps each name to a JniMethod enum, so dispatch compares numbers instead of strings. Calls that reach no handler print one "no handler for" line per class, method and signature. Unknown gameActivity_ callbacks are recorded on the CallVoidMethod path too. The FMOD write path reuses a per-thread buffer instead of allocating.
81 lines
2.3 KiB
C++
81 lines
2.3 KiB
C++
// Counts heap allocations made on the audio thread by FMOD AudioDevice.write.
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#include "jnivm/jnivm.h"
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#include <gtest/gtest.h>
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#include <cstdint>
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#include <cstdlib>
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#include <memory>
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#include <new>
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namespace {
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thread_local bool g_counting = false;
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thread_local std::size_t g_allocations = 0;
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void* CountedAllocate(std::size_t size) noexcept {
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if (g_counting) {
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++g_allocations;
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}
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return std::malloc(size == 0 ? 1 : size);
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}
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} // namespace
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void* operator new(std::size_t size) {
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if (void* memory = CountedAllocate(size)) {
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return memory;
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}
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throw std::bad_alloc();
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}
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void* operator new[](std::size_t size) { return operator new(size); }
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void* operator new(std::size_t size, const std::nothrow_t&) noexcept {
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return CountedAllocate(size);
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}
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void* operator new[](std::size_t size, const std::nothrow_t&) noexcept {
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return CountedAllocate(size);
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}
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void operator delete(void* memory) noexcept { std::free(memory); }
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void operator delete[](void* memory) noexcept { std::free(memory); }
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void operator delete(void* memory, std::size_t) noexcept { std::free(memory); }
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void operator delete[](void* memory, std::size_t) noexcept {
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std::free(memory);
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}
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namespace {
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struct WriteProbe {
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int writes = 0;
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};
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TEST(FmodAudioDeviceWrite, SteadyStateWriteDoesNotAllocate) {
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auto vm = std::make_shared<jnivm::VM>();
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JNIEnv* env = vm->GetJNIEnv();
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auto probe = std::make_shared<WriteProbe>();
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jnivm::FmodAudioDeviceCallbacks callbacks;
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callbacks.write = [](void* context, const void*, const std::uint8_t*,
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std::size_t) {
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++static_cast<WriteProbe*>(context)->writes;
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return true;
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};
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vm->SetFmodAudioDeviceCallbacks(probe, callbacks);
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jclass device_class = env->FindClass("org/fmod/AudioDevice");
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jobject device = env->NewObject(
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device_class, env->GetMethodID(device_class, "<init>", "()V"));
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const jmethodID write = env->GetMethodID(device_class, "write", "([BI)V");
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jbyteArray block = env->NewByteArray(4096);
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env->CallVoidMethod(device, write, block, 4096);
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g_allocations = 0;
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g_counting = true;
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for (int i = 0; i < 64; ++i) {
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env->CallVoidMethod(device, write, block, 4096);
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}
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g_counting = false;
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EXPECT_EQ(g_allocations, 0u);
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EXPECT_EQ(probe->writes, 65);
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vm->ClearFmodAudioDeviceCallbacks();
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}
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} // namespace
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