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JBR-6522: ensure thread-safety in MTLGC_DestroyMTLGraphicsConfig (pthread_mutex_t)

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bourgesl
2024-02-08 16:47:53 +01:00
committed by jbrbot
parent a8c4ec71e4
commit 5909cfb874
1 changed files with 13 additions and 5 deletions
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18
src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLGraphicsConfig.m
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@@ -1,5 +1,5 @@
/*
* Copyright (c) 2019, 2022, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2019, 2024, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@@ -29,6 +29,8 @@
#import "ThreadUtilities.h"
#import "awt.h"
static pthread_mutex_t destroy_mutex = PTHREAD_MUTEX_INITIALIZER;
/**
* Disposes all memory and resources associated with the given
* MTLGraphicsConfigInfo (including its native MTLContext data).
@@ -46,10 +48,16 @@ MTLGC_DestroyMTLGraphicsConfig(jlong pConfigInfo)
return;
}
MTLContext *mtlc = (MTLContext*)mtlinfo->context;
if (mtlc != NULL) {
[mtlinfo->context release];
mtlinfo->context = nil;
if (mtlinfo->context != NULL) {
// Ensure thread-safe free:
pthread_mutex_lock(&destroy_mutex);
const MTLContext *mtlc = (MTLContext*)mtlinfo->context;
if (mtlc != NULL) {
mtlinfo->context = nil;
[mtlc release];
}
pthread_mutex_unlock(&destroy_mutex);
}
free(mtlinfo);
}