source: src/libcfa/concurrency/kernel @ d8548e2

aaron-thesisarm-ehcleanup-dtorsdeferred_resndemanglerenumforall-pointer-decayjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-exprnew-envno_listpersistent-indexerresolv-newwith_gc
Last change on this file since d8548e2 was d8548e2, checked in by Thierry Delisle <tdelisle@…>, 4 years ago

Fixed preemption and changed default_preemption to use cfa_time_t

  • Property mode set to 100644
File size: 2.9 KB
Line 
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// kernel --
8//
9// Author           : Thierry Delisle
10// Created On       : Tue Jan 17 12:27:26 2017
11// Last Modified By : Peter A. Buhr
12// Last Modified On : Sat Jul 22 09:58:39 2017
13// Update Count     : 2
14//
15
16#pragma once
17
18#include <stdbool.h>
19
20#include "invoke.h"
21#include "bits/cfatime.h"
22
23extern "C" {
24#include <pthread.h>
25}
26
27//-----------------------------------------------------------------------------
28// Locks
29struct semaphore {
30        __spinlock_t lock;
31        int count;
32        __queue_t(thread_desc) waiting;
33};
34
35void  ?{}(semaphore & this, int count = 1);
36void ^?{}(semaphore & this);
37void   P (semaphore & this);
38void   V (semaphore & this);
39
40
41//-----------------------------------------------------------------------------
42// Cluster
43struct cluster {
44        // Ready queue locks
45        __spinlock_t ready_queue_lock;
46
47        // Ready queue for threads
48        __queue_t(thread_desc) ready_queue;
49
50        // Preemption rate on this cluster
51        __cfa_time_t preemption_rate;
52};
53
54extern __cfa_time_t default_preemption();
55
56void ?{} (cluster & this);
57void ^?{}(cluster & this);
58
59//-----------------------------------------------------------------------------
60// Processor
61enum FinishOpCode { No_Action, Release, Schedule, Release_Schedule, Release_Multi, Release_Multi_Schedule };
62
63//TODO use union, many of these fields are mutually exclusive (i.e. MULTI vs NOMULTI)
64struct FinishAction {
65        FinishOpCode action_code;
66        thread_desc * thrd;
67        __spinlock_t * lock;
68        __spinlock_t ** locks;
69        unsigned short lock_count;
70        thread_desc ** thrds;
71        unsigned short thrd_count;
72};
73static inline void ?{}(FinishAction & this) {
74        this.action_code = No_Action;
75        this.thrd = NULL;
76        this.lock = NULL;
77}
78static inline void ^?{}(FinishAction & this) {}
79
80// Processor
81// Wrapper around kernel threads
82struct processor {
83        // Main state
84        // Coroutine ctx who does keeps the state of the processor
85        struct processorCtx_t * runner;
86
87        // Cluster from which to get threads
88        cluster * cltr;
89
90        // Handle to pthreads
91        pthread_t kernel_thread;
92
93        // Termination
94        // Set to true to notify the processor should terminate
95        volatile bool do_terminate;
96
97        // Termination synchronisation
98        semaphore terminated;
99
100        // RunThread data
101        // Action to do after a thread is ran
102        struct FinishAction finish;
103
104        // Preemption data
105        // Node which is added in the discrete event simulaiton
106        struct alarm_node_t * preemption_alarm;
107
108        // If true, a preemption was triggered in an unsafe region, the processor must preempt as soon as possible
109        bool pending_preemption;
110
111#ifdef __CFA_DEBUG__
112        // Last function to enable preemption on this processor
113        const char * last_enable;
114#endif
115};
116
117void  ?{}(processor & this);
118void  ?{}(processor & this, cluster * cltr);
119void ^?{}(processor & this);
120
121// Local Variables: //
122// mode: c //
123// tab-width: 4 //
124// End: //
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