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authorJack <66967891+ASpoonPlaysGames@users.noreply.github.com>2024-01-20 22:40:27 +0000
committerGitHub <noreply@github.com>2024-01-20 23:40:27 +0100
commit447cace77f2533e616f82e42787c14f7fcbc039b (patch)
tree152ea76ec2196a808cf3aa0828cbe3436dc0b37d
parent7c9ffa1cabbd03a87a1b8efa1d0db329ba9ecc77 (diff)
downloadNorthstarLauncher-1.22.1-rc2.tar.gz
NorthstarLauncher-1.22.1-rc2.zip
Add and use ScopeGuard (#643)v1.22.1-rc2
Use a scope guard instead of `GOTO` statements for curl cleanup
-rw-r--r--primedev/masterserver/masterserver.cpp114
-rw-r--r--primedev/mods/autodownload/moddownloader.cpp131
-rw-r--r--primedev/util/utils.h20
3 files changed, 147 insertions, 118 deletions
diff --git a/primedev/masterserver/masterserver.cpp b/primedev/masterserver/masterserver.cpp
index aa248464..c4cc22ef 100644
--- a/primedev/masterserver/masterserver.cpp
+++ b/primedev/masterserver/masterserver.cpp
@@ -7,6 +7,7 @@
#include "engine/r2engine.h"
#include "mods/modmanager.h"
#include "shared/misccommands.h"
+#include "util/utils.h"
#include "util/version.h"
#include "server/auth/bansystem.h"
#include "dedicated/dedicated.h"
@@ -118,6 +119,13 @@ void MasterServerManager::AuthenticateOriginWithMasterServer(const char* uid, co
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &readBuffer);
CURLcode result = curl_easy_perform(curl);
+ ScopeGuard cleanup(
+ [&]
+ {
+ m_bOriginAuthWithMasterServerInProgress = false;
+ m_bOriginAuthWithMasterServerDone = true;
+ curl_easy_cleanup(curl);
+ });
if (result == CURLcode::CURLE_OK)
{
@@ -131,13 +139,13 @@ void MasterServerManager::AuthenticateOriginWithMasterServer(const char* uid, co
spdlog::error(
"Failed reading origin auth info response: encountered parse error \"{}\"",
rapidjson::GetParseError_En(originAuthInfo.GetParseError()));
- goto REQUEST_END_CLEANUP;
+ return;
}
if (!originAuthInfo.IsObject() || !originAuthInfo.HasMember("success"))
{
spdlog::error("Failed reading origin auth info response: malformed response object {}", readBuffer);
- goto REQUEST_END_CLEANUP;
+ return;
}
if (originAuthInfo["success"].IsTrue() && originAuthInfo.HasMember("token") && originAuthInfo["token"].IsString())
@@ -174,12 +182,6 @@ void MasterServerManager::AuthenticateOriginWithMasterServer(const char* uid, co
spdlog::error("Failed performing northstar origin auth: error {}", curl_easy_strerror(result));
m_bSuccessfullyConnected = false;
}
-
- // we goto this instead of returning so we always hit this
- REQUEST_END_CLEANUP:
- m_bOriginAuthWithMasterServerInProgress = false;
- m_bOriginAuthWithMasterServerDone = true;
- curl_easy_cleanup(curl);
});
requestThread.detach();
@@ -213,6 +215,13 @@ void MasterServerManager::RequestServerList()
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &readBuffer);
CURLcode result = curl_easy_perform(curl);
+ ScopeGuard cleanup(
+ [&]
+ {
+ m_bRequestingServerList = false;
+ m_bScriptRequestingServerList = false;
+ curl_easy_cleanup(curl);
+ });
if (result == CURLcode::CURLE_OK)
{
@@ -226,20 +235,20 @@ void MasterServerManager::RequestServerList()
spdlog::error(
"Failed reading masterserver response: encountered parse error \"{}\"",
rapidjson::GetParseError_En(serverInfoJson.GetParseError()));
- goto REQUEST_END_CLEANUP;
+ return;
}
if (serverInfoJson.IsObject() && serverInfoJson.HasMember("error"))
{
spdlog::error("Failed reading masterserver response: got fastify error response");
spdlog::error(readBuffer);
- goto REQUEST_END_CLEANUP;
+ return;
}
if (!serverInfoJson.IsArray())
{
spdlog::error("Failed reading masterserver response: root object is not an array");
- goto REQUEST_END_CLEANUP;
+ return;
}
rapidjson::GenericArray<false, rapidjson_document::GenericValue> serverArray = serverInfoJson.GetArray();
@@ -251,7 +260,7 @@ void MasterServerManager::RequestServerList()
if (!serverObj.IsObject())
{
spdlog::error("Failed reading masterserver response: member of server array is not an object");
- goto REQUEST_END_CLEANUP;
+ return;
}
// todo: verify json props are fine before adding to m_remoteServers
@@ -342,12 +351,6 @@ void MasterServerManager::RequestServerList()
spdlog::error("Failed requesting servers: error {}", curl_easy_strerror(result));
m_bSuccessfullyConnected = false;
}
-
- // we goto this instead of returning so we always hit this
- REQUEST_END_CLEANUP:
- m_bRequestingServerList = false;
- m_bScriptRequestingServerList = false;
- curl_easy_cleanup(curl);
});
requestThread.detach();
@@ -374,6 +377,7 @@ void MasterServerManager::RequestMainMenuPromos()
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &readBuffer);
CURLcode result = curl_easy_perform(curl);
+ ScopeGuard cleanup([&] { curl_easy_cleanup(curl); });
if (result == CURLcode::CURLE_OK)
{
@@ -387,20 +391,20 @@ void MasterServerManager::RequestMainMenuPromos()
spdlog::error(
"Failed reading masterserver main menu promos response: encountered parse error \"{}\"",
rapidjson::GetParseError_En(mainMenuPromoJson.GetParseError()));
- goto REQUEST_END_CLEANUP;
+ return;
}
if (!mainMenuPromoJson.IsObject())
{
spdlog::error("Failed reading masterserver main menu promos response: root object is not an object");
- goto REQUEST_END_CLEANUP;
+ return;
}
if (mainMenuPromoJson.HasMember("error"))
{
spdlog::error("Failed reading masterserver response: got fastify error response");
spdlog::error(readBuffer);
- goto REQUEST_END_CLEANUP;
+ return;
}
if (!mainMenuPromoJson.HasMember("newInfo") || !mainMenuPromoJson["newInfo"].IsObject() ||
@@ -428,7 +432,7 @@ void MasterServerManager::RequestMainMenuPromos()
!mainMenuPromoJson["smallButton2"]["ImageIndex"].IsNumber())
{
spdlog::error("Failed reading masterserver main menu promos response: malformed json object");
- goto REQUEST_END_CLEANUP;
+ return;
}
m_sMainMenuPromoData.newInfoTitle1 = mainMenuPromoJson["newInfo"]["Title1"].GetString();
@@ -455,10 +459,6 @@ void MasterServerManager::RequestMainMenuPromos()
spdlog::error("Failed requesting main menu promos: error {}", curl_easy_strerror(result));
m_bSuccessfullyConnected = false;
}
-
- REQUEST_END_CLEANUP:
- // nothing lol
- curl_easy_cleanup(curl);
});
requestThread.detach();
@@ -495,6 +495,21 @@ void MasterServerManager::AuthenticateWithOwnServer(const char* uid, const char*
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &readBuffer);
CURLcode result = curl_easy_perform(curl);
+ ScopeGuard cleanup(
+ [&]
+ {
+ m_bAuthenticatingWithGameServer = false;
+ m_bScriptAuthenticatingWithGameServer = false;
+
+ if (m_bNewgameAfterSelfAuth)
+ {
+ // pretty sure this is threadsafe?
+ Cbuf_AddText(Cbuf_GetCurrentPlayer(), "ns_end_reauth_and_leave_to_lobby", cmd_source_t::kCommandSrcCode);
+ m_bNewgameAfterSelfAuth = false;
+ }
+
+ curl_easy_cleanup(curl);
+ });
if (result == CURLcode::CURLE_OK)
{
@@ -508,13 +523,13 @@ void MasterServerManager::AuthenticateWithOwnServer(const char* uid, const char*
spdlog::error(
"Failed reading masterserver authentication response: encountered parse error \"{}\"",
rapidjson::GetParseError_En(authInfoJson.GetParseError()));
- goto REQUEST_END_CLEANUP;
+ return;
}
if (!authInfoJson.IsObject())
{
spdlog::error("Failed reading masterserver authentication response: root object is not an object");
- goto REQUEST_END_CLEANUP;
+ return;
}
if (authInfoJson.HasMember("error"))
@@ -529,13 +544,13 @@ void MasterServerManager::AuthenticateWithOwnServer(const char* uid, const char*
else
m_sAuthFailureReason = "No error message provided";
- goto REQUEST_END_CLEANUP;
+ return;
}
if (!authInfoJson["success"].IsTrue())
{
spdlog::error("Authentication with masterserver failed: \"success\" is not true");
- goto REQUEST_END_CLEANUP;
+ return;
}
if (!authInfoJson.HasMember("success") || !authInfoJson.HasMember("id") || !authInfoJson["id"].IsString() ||
@@ -543,7 +558,7 @@ void MasterServerManager::AuthenticateWithOwnServer(const char* uid, const char*
!authInfoJson.HasMember("persistentData") || !authInfoJson["persistentData"].IsArray())
{
spdlog::error("Failed reading masterserver authentication response: malformed json object");
- goto REQUEST_END_CLEANUP;
+ return;
}
RemoteAuthData newAuthData {};
@@ -561,7 +576,7 @@ void MasterServerManager::AuthenticateWithOwnServer(const char* uid, const char*
if (!byte.IsUint() || byte.GetUint() > 255)
{
spdlog::error("Failed reading masterserver authentication response: malformed json object");
- goto REQUEST_END_CLEANUP;
+ return;
}
newAuthData.pdata[i++] = static_cast<char>(byte.GetUint());
@@ -581,19 +596,6 @@ void MasterServerManager::AuthenticateWithOwnServer(const char* uid, const char*
m_bSuccessfullyAuthenticatedWithGameServer = false;
m_bScriptAuthenticatingWithGameServer = false;
}
-
- REQUEST_END_CLEANUP:
- m_bAuthenticatingWithGameServer = false;
- m_bScriptAuthenticatingWithGameServer = false;
-
- if (m_bNewgameAfterSelfAuth)
- {
- // pretty sure this is threadsafe?
- Cbuf_AddText(Cbuf_GetCurrentPlayer(), "ns_end_reauth_and_leave_to_lobby", cmd_source_t::kCommandSrcCode);
- m_bNewgameAfterSelfAuth = false;
- }
-
- curl_easy_cleanup(curl);
});
requestThread.detach();
@@ -651,6 +653,13 @@ void MasterServerManager::AuthenticateWithServer(const char* uid, const char* pl
}
CURLcode result = curl_easy_perform(curl);
+ ScopeGuard cleanup(
+ [&]
+ {
+ m_bAuthenticatingWithGameServer = false;
+ m_bScriptAuthenticatingWithGameServer = false;
+ curl_easy_cleanup(curl);
+ });
if (result == CURLcode::CURLE_OK)
{
@@ -664,13 +673,13 @@ void MasterServerManager::AuthenticateWithServer(const char* uid, const char* pl
spdlog::error(
"Failed reading masterserver authentication response: encountered parse error \"{}\"",
rapidjson::GetParseError_En(connectionInfoJson.GetParseError()));
- goto REQUEST_END_CLEANUP;
+ return;
}
if (!connectionInfoJson.IsObject())
{
spdlog::error("Failed reading masterserver authentication response: root object is not an object");
- goto REQUEST_END_CLEANUP;
+ return;
}
if (connectionInfoJson.HasMember("error"))
@@ -685,13 +694,13 @@ void MasterServerManager::AuthenticateWithServer(const char* uid, const char* pl
else
m_sAuthFailureReason = "No error message provided";
- goto REQUEST_END_CLEANUP;
+ return;
}
if (!connectionInfoJson["success"].IsTrue())
{
spdlog::error("Authentication with masterserver failed: \"success\" is not true");
- goto REQUEST_END_CLEANUP;
+ return;
}
if (!connectionInfoJson.HasMember("success") || !connectionInfoJson.HasMember("ip") ||
@@ -700,7 +709,7 @@ void MasterServerManager::AuthenticateWithServer(const char* uid, const char* pl
!connectionInfoJson["authToken"].IsString())
{
spdlog::error("Failed reading masterserver authentication response: malformed json object");
- goto REQUEST_END_CLEANUP;
+ return;
}
m_pendingConnectionInfo.ip.S_un.S_addr = inet_addr(connectionInfoJson["ip"].GetString());
@@ -725,11 +734,6 @@ void MasterServerManager::AuthenticateWithServer(const char* uid, const char* pl
m_bSuccessfullyAuthenticatedWithGameServer = false;
m_bScriptAuthenticatingWithGameServer = false;
}
-
- REQUEST_END_CLEANUP:
- m_bAuthenticatingWithGameServer = false;
- m_bScriptAuthenticatingWithGameServer = false;
- curl_easy_cleanup(curl);
});
requestThread.detach();
diff --git a/primedev/mods/autodownload/moddownloader.cpp b/primedev/mods/autodownload/moddownloader.cpp
index 165399e3..80be8d19 100644
--- a/primedev/mods/autodownload/moddownloader.cpp
+++ b/primedev/mods/autodownload/moddownloader.cpp
@@ -1,4 +1,5 @@
#include "moddownloader.h"
+#include "util/utils.h"
#include <rapidjson/fwd.h>
#include <mz_strm_mem.h>
#include <mz.h>
@@ -74,6 +75,7 @@ void ModDownloader::FetchModsListFromAPI()
curl_easy_setopt(easyhandle, CURLOPT_WRITEDATA, &readBuffer);
curl_easy_setopt(easyhandle, CURLOPT_WRITEFUNCTION, WriteToString);
result = curl_easy_perform(easyhandle);
+ ScopeGuard cleanup([&] { curl_easy_cleanup(easyhandle); });
if (result == CURLcode::CURLE_OK)
{
@@ -82,7 +84,7 @@ void ModDownloader::FetchModsListFromAPI()
else
{
spdlog::error("Fetching mods list failed: {}", curl_easy_strerror(result));
- goto REQUEST_END_CLEANUP;
+ return;
}
// Load mods list into local state
@@ -110,9 +112,6 @@ void ModDownloader::FetchModsListFromAPI()
}
spdlog::info("Done loading verified mods list.");
-
- REQUEST_END_CLEANUP:
- curl_easy_cleanup(easyhandle);
});
requestThread.detach();
}
@@ -170,23 +169,23 @@ std::optional<fs::path> ModDownloader::FetchModFromDistantStore(std::string_view
curl_easy_setopt(easyhandle, CURLOPT_XFERINFOFUNCTION, ModDownloader::ModFetchingProgressCallback);
curl_easy_setopt(easyhandle, CURLOPT_XFERINFODATA, this);
result = curl_easy_perform(easyhandle);
+ ScopeGuard cleanup(
+ [&]
+ {
+ curl_easy_cleanup(easyhandle);
+ fclose(fp);
+ });
if (result == CURLcode::CURLE_OK)
{
spdlog::info("Mod archive successfully fetched.");
- goto REQUEST_END_CLEANUP;
+ return std::optional<fs::path>(downloadPath);
}
else
{
spdlog::error("Fetching mod archive failed: {}", curl_easy_strerror(result));
- failed = true;
- goto REQUEST_END_CLEANUP;
+ return std::optional<fs::path>();
}
-
-REQUEST_END_CLEANUP:
- curl_easy_cleanup(easyhandle);
- fclose(fp);
- return failed ? std::optional<fs::path>() : std::optional<fs::path>(downloadPath);
}
bool ModDownloader::IsModLegit(fs::path modPath, std::string_view expectedChecksum)
@@ -212,6 +211,22 @@ bool ModDownloader::IsModLegit(fs::path modPath, std::string_view expectedChecks
std::vector<char> buffer(bufferSize, '\0');
std::ifstream fp(modPath.generic_string(), std::ios::binary);
+ ScopeGuard cleanup(
+ [&]
+ {
+ if (NULL != hashHandle)
+ {
+ BCryptDestroyHash(hashHandle); // Handle to hash/MAC object which needs to be destroyed
+ }
+
+ if (NULL != algorithmHandle)
+ {
+ BCryptCloseAlgorithmProvider(
+ algorithmHandle, // Handle to the algorithm provider which needs to be closed
+ 0); // Flags
+ }
+ });
+
// Open an algorithm handle
// This sample passes BCRYPT_HASH_REUSABLE_FLAG with BCryptAlgorithmProvider(...) to load a provider which supports reusable hash
status = BCryptOpenAlgorithmProvider(
@@ -222,7 +237,7 @@ bool ModDownloader::IsModLegit(fs::path modPath, std::string_view expectedChecks
if (!NT_SUCCESS(status))
{
modState.state = MOD_CORRUPTED;
- goto cleanup;
+ return false;
}
// Obtain the length of the hash
@@ -235,7 +250,6 @@ bool ModDownloader::IsModLegit(fs::path modPath, std::string_view expectedChecks
0); // Flags
if (!NT_SUCCESS(status))
{
- // goto cleanup;
modState.state = MOD_CORRUPTED;
return false;
}
@@ -252,7 +266,7 @@ bool ModDownloader::IsModLegit(fs::path modPath, std::string_view expectedChecks
if (!NT_SUCCESS(status))
{
modState.state = MOD_CORRUPTED;
- goto cleanup;
+ return false;
}
// Hash archive content
@@ -273,7 +287,7 @@ bool ModDownloader::IsModLegit(fs::path modPath, std::string_view expectedChecks
if (!NT_SUCCESS(status))
{
modState.state = MOD_CORRUPTED;
- goto cleanup;
+ return false;
}
}
}
@@ -289,7 +303,7 @@ bool ModDownloader::IsModLegit(fs::path modPath, std::string_view expectedChecks
if (!NT_SUCCESS(status))
{
modState.state = MOD_CORRUPTED;
- goto cleanup;
+ return false;
}
// Convert hash to string using bytes raw values
@@ -302,21 +316,6 @@ bool ModDownloader::IsModLegit(fs::path modPath, std::string_view expectedChecks
spdlog::info("Expected checksum: {}", expectedChecksum.data());
spdlog::info("Computed checksum: {}", ss.str());
return expectedChecksum.compare(ss.str()) == 0;
-
-cleanup:
- if (NULL != hashHandle)
- {
- BCryptDestroyHash(hashHandle); // Handle to hash/MAC object which needs to be destroyed
- }
-
- if (NULL != algorithmHandle)
- {
- BCryptCloseAlgorithmProvider(
- algorithmHandle, // Handle to the algorithm provider which needs to be closed
- 0); // Flags
- }
-
- return false;
}
bool ModDownloader::IsModAuthorized(std::string_view modName, std::string_view modVersion)
@@ -367,11 +366,20 @@ void ModDownloader::ExtractMod(fs::path modPath)
fs::path modDirectory;
file = unzOpen(modPath.generic_string().c_str());
+ ScopeGuard cleanup(
+ [&]
+ {
+ if (unzClose(file) != MZ_OK)
+ {
+ spdlog::error("Failed closing mod archive after extraction.");
+ }
+ });
+
if (file == NULL)
{
spdlog::error("Cannot open archive located at {}.", modPath.generic_string());
modState.state = FAILED_READING_ARCHIVE;
- goto EXTRACTION_CLEANUP;
+ return;
}
unz_global_info64 gi;
@@ -381,7 +389,7 @@ void ModDownloader::ExtractMod(fs::path modPath)
{
spdlog::error("Failed getting information from archive (error code: {})", status);
modState.state = FAILED_READING_ARCHIVE;
- goto EXTRACTION_CLEANUP;
+ return;
}
// Update state
@@ -414,7 +422,7 @@ void ModDownloader::ExtractMod(fs::path modPath)
{
spdlog::error("Parent directory ({}) creation failed.", fileDestination.parent_path().generic_string());
modState.state = FAILED_WRITING_TO_DISK;
- goto EXTRACTION_CLEANUP;
+ return;
}
}
@@ -426,7 +434,7 @@ void ModDownloader::ExtractMod(fs::path modPath)
{
spdlog::error("Directory creation failed: {}", ec.message());
modState.state = FAILED_WRITING_TO_DISK;
- goto EXTRACTION_CLEANUP;
+ return;
}
}
// ...else create file
@@ -437,7 +445,7 @@ void ModDownloader::ExtractMod(fs::path modPath)
{
spdlog::error("File \"{}\" was not found in archive.", zipFilename);
modState.state = FAILED_READING_ARCHIVE;
- goto EXTRACTION_CLEANUP;
+ return;
}
// Create file
@@ -452,7 +460,7 @@ void ModDownloader::ExtractMod(fs::path modPath)
{
spdlog::error("Could not open file {} from archive.", zipFilename);
modState.state = FAILED_READING_ARCHIVE;
- goto EXTRACTION_CLEANUP;
+ return;
}
// Create destination file
@@ -461,7 +469,7 @@ void ModDownloader::ExtractMod(fs::path modPath)
{
spdlog::error("Failed creating destination file.");
modState.state = FAILED_WRITING_TO_DISK;
- goto EXTRACTION_CLEANUP;
+ return;
}
// Allocate memory for buffer
@@ -470,7 +478,7 @@ void ModDownloader::ExtractMod(fs::path modPath)
{
spdlog::error("Error while allocating memory.");
modState.state = FAILED_WRITING_TO_DISK;
- goto EXTRACTION_CLEANUP;
+ return;
}
// Extract file to destination
@@ -501,7 +509,7 @@ void ModDownloader::ExtractMod(fs::path modPath)
{
spdlog::error("An error occurred during file extraction (code: {})", err);
modState.state = FAILED_WRITING_TO_DISK;
- goto EXTRACTION_CLEANUP;
+ return;
}
err = unzCloseCurrentFile(file);
if (err != UNZ_OK)
@@ -522,16 +530,10 @@ void ModDownloader::ExtractMod(fs::path modPath)
if (status != UNZ_OK)
{
spdlog::error("Error while browsing archive files (error code: {}).", status);
- goto EXTRACTION_CLEANUP;
+ return;
}
}
}
-
-EXTRACTION_CLEANUP:
- if (unzClose(file) != MZ_OK)
- {
- spdlog::error("Failed closing mod archive after extraction.");
- }
}
void ModDownloader::DownloadMod(std::string modName, std::string modVersion)
@@ -548,6 +550,22 @@ void ModDownloader::DownloadMod(std::string modName, std::string modVersion)
{
fs::path archiveLocation;
+ ScopeGuard cleanup(
+ [&]
+ {
+ try
+ {
+ remove(archiveLocation);
+ }
+ catch (const std::exception& a)
+ {
+ spdlog::error("Error while removing downloaded archive: {}", a.what());
+ }
+
+ modState.state = DONE;
+ spdlog::info("Done downloading {}.", modName);
+ });
+
// Download mod archive
std::string expectedHash = verifiedMods[modName].versions[modVersion].checksum;
std::optional<fs::path> fetchingResult = FetchModFromDistantStore(std::string_view(modName), std::string_view(modVersion));
@@ -555,31 +573,18 @@ void ModDownloader::DownloadMod(std::string modName, std::string modVersion)
{
spdlog::error("Something went wrong while fetching archive, aborting.");
modState.state = MOD_FETCHING_FAILED;
- goto REQUEST_END_CLEANUP;
+ return;
}
archiveLocation = fetchingResult.value();
if (!IsModLegit(archiveLocation, std::string_view(expectedHash)))
{
spdlog::warn("Archive hash does not match expected checksum, aborting.");
modState.state = MOD_CORRUPTED;
- goto REQUEST_END_CLEANUP;
+ return;
}
// Extract downloaded mod archive
ExtractMod(archiveLocation);
-
- REQUEST_END_CLEANUP:
- try
- {
- remove(archiveLocation);
- }
- catch (const std::exception& a)
- {
- spdlog::error("Error while removing downloaded archive: {}", a.what());
- }
-
- modState.state = DONE;
- spdlog::info("Done downloading {}.", modName);
});
requestThread.detach();
diff --git a/primedev/util/utils.h b/primedev/util/utils.h
index 85922692..1a419607 100644
--- a/primedev/util/utils.h
+++ b/primedev/util/utils.h
@@ -1,3 +1,23 @@
#pragma once
void RemoveAsciiControlSequences(char* str, bool allow_color_codes);
+
+class ScopeGuard
+{
+public:
+ auto operator=(ScopeGuard&) = delete;
+ ScopeGuard(ScopeGuard&) = delete;
+
+ ScopeGuard(std::function<void()> callback) : m_callback(callback) {}
+ ~ScopeGuard()
+ {
+ m_callback();
+ }
+ void Dismiss()
+ {
+ m_callback = [] {};
+ }
+
+private:
+ std::function<void()> m_callback;
+};