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.\" This -*- nroff -*- file has been generated from
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.ta 8n 16n 24n 32n 40n 48n 56n 64n 72n
.TH "rtl_stop_interrupts" "3"
.SH "NAME"
rtl_no_interrupts, rtl_restore_interruptsrtl_restore_interrupts, rtl_stop_interruptsrtl_stop_interrupts, rtl_allow_interruptsrtl_allow_interrupts \(em control the CPU interrupt state
.SH "SYNOPSIS"
.PP
.nf
.ta 8n 16n 24n 32n 40n 48n 56n 64n 72n
#include <rtl_sync.h>
void \fBrtl_no_interrupts\fP(rtl_irqstate_t \fBstate\fR);
void \fBrtl_restore_interrupts\fP(rtl_irqstate_t \fBstate\fR);
void \fBrtl_stop_interrupts\fP();
void \fBrtl_allow_interrupts\fP();
.fi
.SH "DESCRIPTION"
.PP
These functions are non-portable Realtime Linux extensions.
.PP
\fBrtl_no_interrupts\fP saves the current state of the processor interrupt flags in the variable \fBstate\fR and then disables the interrupts on this processor.
.PP
\fBrtl_restore_interrupts\fP is defined as a macro. It uses its argument to restore the interrupt state previously saved with \fBrtl_no_interrupts\fP.
.PP
\fBrtl_stop_interrupts\fP disables the interrupts.
.PP
\fBrtl_allow_interrupts\fP enables the interrupts.
.SH "EXAMPLE"
.PP
The following example demonstrates a typical usage.
.PP
.nf
.ta 8n 16n 24n 32n 40n 48n 56n 64n 72n
\f(CW {
rtl_irqstate_t irqstate;
rtl_no_interrupts(irqstate);
/* this code runs with interrupts disabled! */
rtl_restore_interrupts(irqstate);
/* interrupt state is back to what it was before */
}\fR
.fi
.PP
.SH "NOTES"
.PP
These functions have effect only on the interrupt flags of the current processor.
.PP
Be sure to only disable hardware interrupts for short periods of time.
.SH "AUTHOR"
.PP
Michael Barabanov (\fIbaraban@fsmlabs.com (link to URL mailto:baraban@fsmlabs.com) \fR)
.SH "SEE ALSO"
\fIrtl_request_irq(3) (link to URL rtl_request_irq.3.html) \fR, \fIrtl_free_irq(3) (link to URL rtl_free_irq.3.html) \fR, \fIrtl_hard_enable_irq(3) (link to URL rtl_hard_enable_irq.3.html) \fR, \fIrtl_hard_disable_irq(3) (link to URL rtl_hard_disable_irq.3.html) \fR
.PP
\(co2001 FSMLabs Inc.
.PP
All rights reserved.
...\" created by instant / docbook-to-man, Wed 13 Jun 2001, 17:58
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