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Only allow sequential runs of package checking

Browse source 
If the current monitor would quickly change, GetOutdatedPackagesAsync
would be called while the previous instance is still running, which
caused crashes. Now, GetOutdatedPackagesAsync only uses one
instance/callback a time.
This commit is contained in:
scorpion-26 2024-03-15 19:30:38 +01:00
parent ad91833407
commit 6fc09324ab
2 changed files with 38 additions and 27 deletions
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64
src/System.cpp
View file

@ -576,17 +576,28 @@ namespace System
void GetOutdatedPackagesAsync(std::function<void(uint32_t)>&& returnVal)
{
static bool currentlyRunning = false;
static std::function<void(uint32_t)> handlerFunction;
static std::mutex configMutex;
configMutex.lock();
if (!RuntimeConfig::Get().hasPackagesScript)
{
configMutex.unlock();
return; // Don't bother
std::scoped_lock<std::mutex> lock(configMutex);
if (!RuntimeConfig::Get().hasPackagesScript)
{
return; // Don't bother
}
handlerFunction = returnVal;
if (currentlyRunning)
{
// Thread is running, only update handler
return;
}
currentlyRunning = true;
}
configMutex.unlock();
std::thread(
[](std::function<void(uint32_t)> returnVal)
[&]()
{
// We need a pipe, since there is no "libpacman". This should only be called every so often anyways
std::string number;
@ -601,29 +612,28 @@ namespace System
ASSERT(feof(pipe), "GetOutdatedPackages: Cannot read to eof!");
int exitCode = pclose(pipe) / 256;
if (exitCode != 0)
{
configMutex.lock();
// Invalid script/error
LOG("GetOutdatedPackages: Invalid command. Disabling package widget!");
RuntimeConfig::Get().hasPackagesScript = false;
configMutex.unlock();
return;
std::scoped_lock<std::mutex> lock(configMutex);
if (exitCode != 0)
{
// Invalid script/error
LOG("GetOutdatedPackages: Invalid command. Disabling package widget!");
RuntimeConfig::Get().hasPackagesScript = false;
currentlyRunning = false;
return;
}
try
{
handlerFunction(std::stoul(buf));
}
catch (std::invalid_argument&)
{
LOG("GetOutdatedPackages: Invalid output of the package script. Disabling package widget!");
RuntimeConfig::Get().hasPackagesScript = false;
}
currentlyRunning = false;
}
try
{
returnVal(std::stoul(buf));
}
catch (std::invalid_argument&)
{
configMutex.lock();
LOG("GetOutdatedPackages: Invalid output of the package script. Disabling package widget!");
RuntimeConfig::Get().hasPackagesScript = false;
configMutex.unlock();
return;
}
},
std::move(returnVal))
})
.detach();
}

1
src/System.h
View file

@ -108,6 +108,7 @@ namespace System
// Bytes per second download. dx is time since last call. Will always return 0 on first run
double GetNetworkBpsDownload(double dt);
// This can only be called one at a time. If it is already running it is assumed, that the old handler is no longer valid.
void GetOutdatedPackagesAsync(std::function<void(uint32_t)>&& returnVal);
std::string GetTime();