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Add EventDriverFiles.isUnique #242

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merged 1 commit into from
Sep 13, 2024
Merged

Add EventDriverFiles.isUnique #242

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3 changes: 3 additions & 0 deletions source/eventcore/driver.d
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Original file line number Diff line number Diff line change
Expand Up @@ -540,6 +540,9 @@ interface EventDriverFiles {
*/
bool isValid(FileFD handle) const @nogc;

/// Determines if the given file's reference count equals one.
bool isUnique(FileFD descriptor) const;

/** Increments the reference count of the given file.
*/
void addRef(FileFD descriptor);
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6 changes: 6 additions & 0 deletions source/eventcore/drivers/threadedfile.d
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Expand Up @@ -417,6 +417,12 @@ final class ThreadedFileEventDriver(Events : EventDriverEvents, Core : EventDriv
return m_files[handle.value].validationCounter == handle.validationCounter;
}

final override bool isUnique(FileFD handle)
const {
if (!isValid(handle)) return false;
return m_files[handle.value].refCount == 1;
}

final override void addRef(FileFD descriptor)
{
if (!isValid(descriptor)) return;
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8 changes: 8 additions & 0 deletions source/eventcore/drivers/winapi/files.d
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Expand Up @@ -309,6 +309,14 @@ final class WinAPIEventDriverFiles : EventDriverFiles {
return false;
}

override bool isUnique(FileFD handle)
const {
if (!isValid(handle)) return false;
if (auto ps = idToHandle(handle) in m_core.m_handles)
return ps.refCount == 1;
return false;
}

override void addRef(FileFD descriptor)
{
if (!isValid(descriptor)) return;
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