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getXsignaldata() can call additional Xlib procedures which could generate an I/O interrupt. To avoid deadlocks in Xlib, ensure that XLocked is set when getXsignaldata() is called.
37 lines
923 B
C
Executable File
37 lines
923 B
C
Executable File
#ifndef LDEXDEFS_H
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#define LDEXDEFS_H 1
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/* $Id: ldeXdefs.h,v 1.2 1999/01/03 02:06:07 sybalsky Exp $ (C) Copyright Venue, All Rights Reserved */
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/* * * * * X defs for all files in Medley * * * * */
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/************************************************************************/
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/* */
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/* (C) Copyright 1989-92 Venue. All Rights Reserved. */
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/* Manufactured in the United States of America. */
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/* */
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/************************************************************************/
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#ifdef LOCK_X_UPDATES
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#define XLOCK do { XLocked++; } while (0)
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#define XUNLOCK(dsp) \
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do { \
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if (XLocked == 1 && XNeedSignal) \
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{ \
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XNeedSignal = 0; \
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getXsignaldata(dsp); \
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}; \
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XLocked--; \
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} while (0)
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#else
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#define XLOCK
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#define XUNLOCK
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#endif /* LOCK_X_UPDATES */
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#include <signal.h>
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extern volatile sig_atomic_t XLocked;
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extern volatile sig_atomic_t XNeedSignal;
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#endif
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