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b79f73df JL |
1 | /* Implement tasking-related runtime actions for CHILL. |
2 | Copyright (C) 1992,1993 Free Software Foundation, Inc. | |
3 | Author: Wilfried Moser | |
4 | ||
5 | This file is part of GNU CC. | |
6 | ||
7 | GNU CC is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GNU CC is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU CC; see the file COPYING. If not, write to | |
201853b4 JL |
19 | the Free Software Foundation, 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
b79f73df | 21 | |
502b941f JL |
22 | /* As a special exception, if you link this library with other files, |
23 | some of which are compiled with GCC, to produce an executable, | |
24 | this library does not by itself cause the resulting executable | |
25 | to be covered by the GNU General Public License. | |
26 | This exception does not however invalidate any other reasons why | |
27 | the executable file might be covered by the GNU General Public License. */ | |
28 | ||
b79f73df JL |
29 | #include "rtltypes.h" |
30 | #include "rts.h" | |
31 | ||
32 | /* | |
33 | * function __queue_length | |
34 | * | |
35 | * parameters: | |
36 | * buf_ev Buffer or event location | |
37 | * is_event 0 .. buf_ev is a buffer location | |
38 | * 1 .. buf_ev is an event location | |
39 | * | |
40 | * returns: | |
41 | * int number of delayed processeson an event location | |
42 | * or number of send delayed processes on a buffer | |
43 | * | |
44 | * exceptions: | |
45 | * none | |
46 | * | |
47 | * abstract: | |
48 | * implements the QUEUE_LENGTH built-in. | |
49 | * | |
50 | */ | |
51 | ||
52 | int | |
53 | __queue_length (buf_ev, is_event) | |
54 | void *buf_ev; | |
55 | int is_event; | |
56 | { | |
57 | int retval = 0; | |
58 | ||
59 | /* if buf_ev == 0 then we don't have anything */ | |
60 | if (buf_ev == 0) | |
61 | return 0; | |
62 | ||
63 | if (is_event) | |
64 | { | |
65 | /* process an event queue */ | |
66 | Event_Queue *ev = buf_ev; | |
67 | ||
68 | while (ev) | |
69 | { | |
70 | retval++; | |
71 | ev = ev->forward; | |
72 | } | |
73 | } | |
74 | else | |
75 | { | |
76 | /* process a buffer queue */ | |
77 | Buffer_Queue *bq = buf_ev; | |
78 | Buffer_Send_Queue *bsq = bq->sendqueue; | |
79 | ||
80 | while (bsq) | |
81 | { | |
82 | retval++; | |
83 | bsq = bsq->forward; | |
84 | } | |
85 | } | |
86 | return retval; | |
87 | } |