cpp: Use #pragma once instead of #ifndef guards
[ghc.git] / includes / rts / BlockSignals.h
1 /* -----------------------------------------------------------------------------
2 *
3 * (c) The GHC Team, 1998-2009
4 *
5 * RTS signal handling
6 *
7 * Do not #include this file directly: #include "Rts.h" instead.
8 *
9 * To understand the structure of the RTS headers, see the wiki:
10 * http://ghc.haskell.org/trac/ghc/wiki/Commentary/SourceTree/Includes
11 *
12 * ---------------------------------------------------------------------------*/
13
14 #pragma once
15
16 /* Used by runProcess() in the process package
17 */
18
19 /*
20 * Function: blockUserSignals()
21 *
22 * Temporarily block the delivery of further console events. Needed to
23 * avoid race conditions when GCing the queue of outstanding handlers or
24 * when emptying the queue by running the handlers.
25 *
26 */
27 void blockUserSignals(void);
28
29 /*
30 * Function: unblockUserSignals()
31 *
32 * The inverse of blockUserSignals(); re-enable the deliver of console events.
33 */
34 void unblockUserSignals(void);