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Backport PR #28398 on branch v3.9.x (Add GIL Release to flush_events in macosx backend) #28470

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Merged
merged 1 commit into from
Jun 26, 2024
Merged

Backport PR #28398 on branch v3.9.x (Add GIL Release to flush_events in macosx backend) #28470

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9 changes: 9 additions & 0 deletions src/_macosx.m
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Original file line number Diff line number Diff line change
Expand Up @@ -77,6 +77,9 @@ static int wait_for_stdin() {

// continuously run an event loop until the stdin_received flag is set to exit
while (!stdin_received && !stdin_sigint) {
// This loop is similar to the main event loop and flush_events which have
// Py_[BEGIN|END]_ALLOW_THREADS surrounding the loop.
// This should not be necessary here because PyOS_InputHook releases the GIL for us.
while (true) {
NSEvent *event = [NSApp nextEventMatchingMask: NSEventMaskAny
untilDate: [NSDate distantPast]
Expand Down Expand Up @@ -380,6 +383,9 @@ static CGFloat _get_device_scale(CGContextRef cr)
// to process, breaking out of the loop when no events remain and
// displaying the canvas if needed.
NSEvent *event;

Py_BEGIN_ALLOW_THREADS

while (true) {
event = [NSApp nextEventMatchingMask: NSEventMaskAny
untilDate: [NSDate distantPast]
Expand All @@ -390,6 +396,9 @@ static CGFloat _get_device_scale(CGContextRef cr)
}
[NSApp sendEvent:event];
}

Py_END_ALLOW_THREADS

[self->view displayIfNeeded];
Py_RETURN_NONE;
}
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