source: src/libcfa/concurrency/monitor @ d67cdb7

aaron-thesisarm-ehcleanup-dtorsdeferred_resndemanglerjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-exprnew-envno_listpersistent-indexerresolv-newwith_gc
Last change on this file since d67cdb7 was d67cdb7, checked in by Peter A. Buhr <pabuhr@…>, 4 years ago

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1//
2// Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
7// monitor --
8//
9// Author           : Thierry Delisle
10// Created On       : Thd Feb 23 12:27:26 2017
11// Last Modified By : Peter A. Buhr
12// Last Modified On : Sat Jul 22 09:59:01 2017
13// Update Count     : 3
14//
15
16#pragma once
17
18#include <stddef.h>
19
20#include <assert.h>
21#include "invoke.h"
22#include "stdlib"
23
24trait is_monitor(dtype T) {
25        monitor_desc * get_monitor( T & );
26        void ^?{}( T & mutex );
27};
28
29static inline void ?{}(monitor_desc & this) {
30        (this.lock){};
31        this.owner = NULL;
32        (this.entry_queue){};
33        (this.signal_stack){};
34        this.recursion = 0;
35        this.mask.accepted = NULL;
36        this.mask.clauses  = NULL;
37        this.mask.size     = 0;
38}
39
40struct monitor_guard_t {
41        monitor_desc ** m;
42        int count;
43        monitor_desc ** prev_mntrs;
44        unsigned short  prev_count;
45        fptr_t          prev_func;
46};
47
48static inline int ?<?(monitor_desc* lhs, monitor_desc* rhs) {
49        return ((intptr_t)lhs) < ((intptr_t)rhs);
50}
51
52void ?{}( monitor_guard_t & this, monitor_desc ** m, int count, void (*func)() );
53void ^?{}( monitor_guard_t & this );
54
55//-----------------------------------------------------------------------------
56// Internal scheduling
57
58struct __condition_criterion_t {
59        bool ready;                                             //Whether or not the criterion is met (True if met)
60        monitor_desc * target;                          //The monitor this criterion concerns
61        struct __condition_node_t * owner;              //The parent node to which this criterion belongs
62        __condition_criterion_t * next;         //Intrusive linked list Next field
63};
64
65struct __condition_node_t {
66        thread_desc * waiting_thread;                   //Thread that needs to be woken when all criteria are met
67        __condition_criterion_t * criteria;     //Array of criteria (Criterions are contiguous in memory)
68        unsigned short count;                           //Number of criterions in the criteria
69        __condition_node_t * next;                      //Intrusive linked list Next field
70        uintptr_t user_info;                            //Custom user info accessible before signalling
71};
72
73struct __condition_blocked_queue_t {
74        __condition_node_t * head;
75        __condition_node_t ** tail;
76};
77
78void ?{}( __condition_blocked_queue_t & );
79void append( __condition_blocked_queue_t *, __condition_node_t * );
80__condition_node_t * pop_head( __condition_blocked_queue_t * );
81
82struct condition {
83        __condition_blocked_queue_t blocked;    //Link list which contains the blocked threads as-well as the information needed to unblock them
84        monitor_desc ** monitors;                       //Array of monitor pointers (Monitors are NOT contiguous in memory)
85        unsigned short monitor_count;                   //Number of monitors in the array
86};
87
88static inline void ?{}( condition & this ) {
89        this.monitors = NULL;
90        this.monitor_count = 0;
91}
92
93static inline void ^?{}( condition & this ) {
94        free( this.monitors );
95}
96
97void wait( condition * this, uintptr_t user_info = 0 );
98bool signal( condition * this );
99bool signal_block( condition * this );
100static inline bool is_empty( condition * this ) { return !this->blocked.head; }
101uintptr_t front( condition * this );
102
103//-----------------------------------------------------------------------------
104// External scheduling
105
106struct __acceptable_t {
107        __monitor_group_t;
108        bool is_dtor;
109};
110
111void __waitfor_internal( const __waitfor_mask_t & mask, int duration );
112
113// Local Variables: //
114// mode: c //
115// tab-width: 4 //
116// End: //
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