mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-27 06:12:15 +00:00
122 lines
4.2 KiB
C++
122 lines
4.2 KiB
C++
/*
|
|
* Copyright (c) 2018-2020 Atmosphère-NX
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#include "ldr_ecs.hpp"
|
|
|
|
namespace ams::ldr::ecs {
|
|
|
|
namespace {
|
|
|
|
/* Convenience definition. */
|
|
constexpr size_t DeviceNameSizeMax = 0x20;
|
|
constexpr size_t MaxExternalContentSourceCount = 0x10;
|
|
|
|
/* Types. */
|
|
class ExternalContentSource {
|
|
NON_COPYABLE(ExternalContentSource);
|
|
NON_MOVEABLE(ExternalContentSource);
|
|
private:
|
|
bool has_mounted = false;
|
|
char device_name[DeviceNameSizeMax];
|
|
os::ManagedHandle client;
|
|
|
|
Result Mount() {
|
|
/* Create service. */
|
|
Service srv;
|
|
serviceCreate(&srv, client.Move());
|
|
FsFileSystem fs = { srv };
|
|
auto fs_guard = SCOPE_GUARD { fsFsClose(&fs); };
|
|
|
|
/* Try to mount. */
|
|
R_UNLESS(fsdevMountDevice(device_name, fs) >= 0, fs::ResultMountNameAlreadyExists());
|
|
fs_guard.Cancel();
|
|
|
|
this->has_mounted = true;
|
|
return ResultSuccess();
|
|
}
|
|
public:
|
|
ExternalContentSource(const char *dn, os::ManagedHandle client) : client(std::move(client)) {
|
|
std::strncpy(this->device_name, dn, sizeof(this->device_name));
|
|
this->device_name[sizeof(this->device_name) - 1] = '\0';
|
|
}
|
|
|
|
Result EnsureMounted() {
|
|
if (!this->has_mounted) {
|
|
return Mount();
|
|
}
|
|
return ResultSuccess();
|
|
}
|
|
|
|
~ExternalContentSource() {
|
|
if (this->has_mounted) {
|
|
fsdevUnmountDevice(this->device_name);
|
|
}
|
|
}
|
|
|
|
const char *GetDeviceName() const {
|
|
return this->device_name;
|
|
}
|
|
};
|
|
|
|
/* Global storage. */
|
|
std::unordered_map<u64, ExternalContentSource> g_map;
|
|
}
|
|
|
|
/* API. */
|
|
const char *Get(ncm::ProgramId program_id) {
|
|
auto it = g_map.find(static_cast<u64>(program_id));
|
|
if (it == g_map.end()) {
|
|
return nullptr;
|
|
}
|
|
if (R_FAILED(it->second.EnsureMounted())) {
|
|
g_map.erase(it);
|
|
return nullptr;
|
|
}
|
|
return it->second.GetDeviceName();
|
|
}
|
|
|
|
Result Set(Handle *out, ncm::ProgramId program_id) {
|
|
/* TODO: Is this an appropriate error? */
|
|
R_UNLESS(g_map.size() < MaxExternalContentSourceCount, ldr::ResultTooManyArguments());
|
|
|
|
/* Clear any sources. */
|
|
R_ASSERT(Clear(program_id));
|
|
|
|
/* Generate mountpoint. */
|
|
char device_name[DeviceNameSizeMax];
|
|
std::snprintf(device_name, DeviceNameSizeMax, "ecs-%016lx", static_cast<u64>(program_id));
|
|
|
|
/* Create session. */
|
|
os::ManagedHandle server, client;
|
|
R_TRY(svcCreateSession(server.GetPointer(), client.GetPointer(), 0, 0));
|
|
|
|
/* Do not create service yet. */
|
|
/* Defer until we've handed the server side back so we don't deadlock on querying pointer buffer size. */
|
|
|
|
/* Add to map. */
|
|
g_map.emplace(std::piecewise_construct,
|
|
std::make_tuple(static_cast<u64>(program_id)),
|
|
std::make_tuple(device_name, std::move(client)));
|
|
*out = server.Move();
|
|
return ResultSuccess();
|
|
}
|
|
|
|
Result Clear(ncm::ProgramId program_id) {
|
|
/* Delete if present. */
|
|
g_map.erase(static_cast<u64>(program_id));
|
|
return ResultSuccess();
|
|
}
|
|
|
|
}
|