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#include "asset-manager.hpp"
#include "thread_pool.hpp"
#include <chrono>
#include <filesystem>
#include <fstream>
#include <future>
const PkeHandleItemIndex_T maxAssetItemsPerBucket = 64;
struct AssetBucket {
Asset assets[maxAssetItemsPerBucket];
};
BucketContainer<AssetBucket, AssetHandle> Asset_BucketContainer{};
ThreadPoolHandle assetThreadPool = ThreadPoolHandle_MAX;
void AM_Init() {
Buckets_Init(Asset_BucketContainer);
assetThreadPool = PkeThreads_Init(2, 255);
}
void AM_Load_Task(Asset &asset) {
std::ifstream file(asset.basePath, std::ios::ate | std::ios::binary);
if (!file.is_open()) {
asset.state = PKE_ASSET_LOADING_STATE_FAILED;
return;
}
asset.size = std::filesystem::file_size(asset.basePath);
asset.ptr = Pke_New(asset.size, 64);
file.seekg(0, std::ios::beg);
file.read(static_cast<char *>(asset.ptr), asset.size);
file.close();
asset.state = PKE_ASSET_LOADING_STATE_LOADED;
}
AssetHandle AM_Register(const void *data, int64_t size, std::size_t alignment, const char *key) {
assert(data != nullptr && "Attempt to register invalid asset data");
assert(data != CAFE_BABE(void) && "Attempt to register invalid asset data");
assert(size != 0 && "Attempt to register asset data of size 0");
bool moved;
AssetHandle assetHandle{Buckets_NewHandle<AssetBucket>(maxAssetItemsPerBucket, Asset_BucketContainer, moved)};
Asset &asset = Asset_BucketContainer.buckets[assetHandle.bucketIndex].assets[assetHandle.itemIndex];
new (&asset) Asset{};
int64_t keyLen = strlen(key);
int64_t keyOffset = (keyLen > 16 ? keyLen - 16 : 0);
strncpy(asset.key, key + keyOffset, 16);
asset.basePath = nullptr;
asset.size = size;
asset.ptr = Pke_New(size, alignment);
memcpy(asset.ptr, data, size);
asset.state = PKE_ASSET_LOADING_STATE_LOADED;
return assetHandle;
}
AssetHandle AM_Register(const char *path) {
bool moved = false;
AssetHandle assetHandle{Buckets_NewHandle<AssetBucket>(maxAssetItemsPerBucket, Asset_BucketContainer, moved)};
Asset &asset = Asset_BucketContainer.buckets[assetHandle.bucketIndex].assets[assetHandle.itemIndex];
new (&asset) Asset{};
int64_t pathLen = strlen(path);
int64_t pathOffset = (pathLen > 16 ? pathLen - 16 : 0);
strncpy(asset.key, path + pathOffset, 16);
auto *copiedPath = Pke_New<char>(pathLen + 1);
copiedPath[pathLen] = '\0';
strncpy(copiedPath, path, pathLen);
asset.basePath = copiedPath;
asset.state = PKE_ASSET_LOADING_STATE_LOADING;
std::packaged_task<void()> *task = Pke_New<std::packaged_task<void()>>();
new (task) std::packaged_task<void()>( [&asset] {
AM_Load_Task(asset);
});
asset.future = task->get_future();
PkeThreads_Enqueue(assetThreadPool, task);
return assetHandle;
}
void AM_Release(AssetHandle assetHandle) {
assert(assetHandle != AssetHandle_MAX);
Asset &asset = Asset_BucketContainer.buckets[assetHandle.bucketIndex].assets[assetHandle.itemIndex];
asset.referenceCount -= 1;
assert(asset.referenceCount >= 0 && "asset was unloaded more times than it was retrieved");
}
const Asset *AM_Get(AssetHandle assetHandle) {
auto validationResult = ValidateHandle(assetHandle, Asset_BucketContainer.pkeHandle, maxAssetItemsPerBucket);
assert(validationResult == 0);
auto &asset = Asset_BucketContainer.buckets[assetHandle.bucketIndex].assets[assetHandle.itemIndex];
if (asset.state == PKE_ASSET_LOADING_STATE_LOADED) {
asset.referenceCount += 1;
return &asset;
}
if (asset.state == PKE_ASSET_LOADING_STATE_UNLOADED) {
if (asset.basePath == nullptr) {
return nullptr;
}
asset.state = PKE_ASSET_LOADING_STATE_LOADING;
std::packaged_task<void()> *task = Pke_New<std::packaged_task<void()>>();
new (task) std::packaged_task<void()>( [&asset] {
AM_Load_Task(asset);
});
asset.future = task->get_future();
PkeThreads_Enqueue(assetThreadPool, task);
}
if (asset.state == PKE_ASSET_LOADING_STATE_LOADING) {
if (asset.future.valid()) {
asset.future.wait();
} else {
char buf[256];
buf[255] = '\0';
snprintf(buf, 255, "[AM_Get] Attempting to retrieve asset: '%.16s' which had a state of '%hhu', but did not have a valid future and thus cannot wait for completion", asset.key, asset.state);
throw buf;
}
}
if (asset.state == PKE_ASSET_LOADING_STATE_LOADED)
asset.referenceCount += 1;
return &asset;
}
void AM_DebugPrint() {
printf("Asset Manager printout:\n");
for (uint64_t b = 0; b <= Asset_BucketContainer.pkeHandle.bucketIndex; ++b) {
auto &bkt = Asset_BucketContainer.buckets[b];
uint64_t counter = b == Asset_BucketContainer.pkeHandle.bucketIndex ? Asset_BucketContainer.pkeHandle.itemIndex : maxAssetItemsPerBucket;
for (uint64_t i = 0; i < counter; ++i) {
auto &asset = bkt.assets[i];
/*
if (asset.size == 0)
continue;
*/
printf("-Asset: 0x%016lX\n", (b << 32) + i);
printf("\tkey: %.16s\n", asset.key);
if (asset.basePath != nullptr) {
printf("\tbasePath: %s\n", asset.basePath);
} else {
printf("\tbasePath: %p\n", nullptr);
}
printf("\tsize: %ld\n", asset.size);
printf("\tptr %p\n", asset.ptr);
printf("\tfuture: %i\n", asset.future.valid());
printf("\treferenceCount: %i\n", asset.referenceCount);
printf("\tAssetLoadingState: %hhu\n", asset.state);
}
}
}
void AM_GC() {
for (long b = 0; b <= Asset_BucketContainer.pkeHandle.bucketIndex; ++b) {
for (long i = 0; i < Asset_BucketContainer.pkeHandle.itemIndex; ++i) {
Asset &asset = Asset_BucketContainer.buckets[b].assets[i];
if (asset.referenceCount > 0)
continue;
if (asset.ptr != nullptr && asset.ptr != CAFE_BABE(void)) {
Pke_Delete(asset.ptr, asset.size);
}
asset.size = 0;
asset.ptr = CAFE_BABE(void);
asset.future = std::future<void>{};
asset.state = PKE_ASSET_LOADING_STATE_UNLOADED;
}
}
}
void AM_Teardown() {
AM_GC();
Buckets_Destroy(Asset_BucketContainer);
PkeThreads_Teardown(assetThreadPool);
}
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