source: libcfa/src/concurrency/kernel.hfa @ 0f2c555

arm-ehjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-expr
Last change on this file since 0f2c555 was 0f2c555, checked in by Thierry Delisle <tdelisle@…>, 22 months ago

Removed attribute const on active_* routines as it is unclear how safe this is

  • Property mode set to 100644
File size: 4.2 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 : Tue Feb  4 12:29:26 2020
13// Update Count     : 22
14//
15
16#pragma once
17
18#include <stdbool.h>
19
20#include "invoke.h"
21#include "time_t.hfa"
22#include "coroutine.hfa"
23
24extern "C" {
25#include <pthread.h>
26#include <semaphore.h>
27}
28
29//-----------------------------------------------------------------------------
30// Locks
31struct semaphore {
32        __spinlock_t lock;
33        int count;
34        __queue_t(thread_desc) waiting;
35};
36
37void  ?{}(semaphore & this, int count = 1);
38void ^?{}(semaphore & this);
39void   P (semaphore & this);
40void   V (semaphore & this);
41
42
43//-----------------------------------------------------------------------------
44// Processor
45extern struct cluster * mainCluster;
46
47// Processor
48coroutine processorCtx_t {
49        struct processor * proc;
50};
51
52// Wrapper around kernel threads
53struct processor {
54        // Main state
55        // Coroutine ctx who does keeps the state of the processor
56        struct processorCtx_t runner;
57
58        // Cluster from which to get threads
59        struct cluster * cltr;
60
61        // Name of the processor
62        const char * name;
63
64        // Handle to pthreads
65        pthread_t kernel_thread;
66
67        // RunThread data
68        // Action to do after a thread is ran
69        thread_desc * destroyer;
70
71        // Preemption data
72        // Node which is added in the discrete event simulaiton
73        struct alarm_node_t * preemption_alarm;
74
75        // If true, a preemption was triggered in an unsafe region, the processor must preempt as soon as possible
76        bool pending_preemption;
77
78        // Idle lock
79        __bin_sem_t idleLock;
80
81        // Termination
82        // Set to true to notify the processor should terminate
83        volatile bool do_terminate;
84
85        // Termination synchronisation
86        semaphore terminated;
87
88        // pthread Stack
89        void * stack;
90
91        // Link lists fields
92        struct __dbg_node_proc {
93                struct processor * next;
94                struct processor * prev;
95        } node;
96
97#ifdef __CFA_DEBUG__
98        // Last function to enable preemption on this processor
99        const char * last_enable;
100#endif
101};
102
103void  ?{}(processor & this, const char name[], struct cluster & cltr);
104void ^?{}(processor & this);
105
106static inline void  ?{}(processor & this)                    { this{ "Anonymous Processor", *mainCluster}; }
107static inline void  ?{}(processor & this, struct cluster & cltr)    { this{ "Anonymous Processor", cltr}; }
108static inline void  ?{}(processor & this, const char name[]) { this{name, *mainCluster }; }
109
110static inline [processor *&, processor *& ] __get( processor & this ) __attribute__((const)) { return this.node.[next, prev]; }
111
112//-----------------------------------------------------------------------------
113// Cluster
114struct cluster {
115        // Ready queue locks
116        __spinlock_t ready_queue_lock;
117
118        // Ready queue for threads
119        __queue_t(thread_desc) ready_queue;
120
121        // Name of the cluster
122        const char * name;
123
124        // Preemption rate on this cluster
125        Duration preemption_rate;
126
127        // List of processors
128        __spinlock_t proc_list_lock;
129        __dllist_t(struct processor) procs;
130        __dllist_t(struct processor) idles;
131        unsigned int nprocessors;
132
133        // List of threads
134        __spinlock_t thread_list_lock;
135        __dllist_t(struct thread_desc) threads;
136        unsigned int nthreads;
137
138        // Link lists fields
139        struct __dbg_node_cltr {
140                cluster * next;
141                cluster * prev;
142        } node;
143};
144extern Duration default_preemption();
145
146void ?{} (cluster & this, const char name[], Duration preemption_rate);
147void ^?{}(cluster & this);
148
149static inline void ?{} (cluster & this)                           { this{"Anonymous Cluster", default_preemption()}; }
150static inline void ?{} (cluster & this, Duration preemption_rate) { this{"Anonymous Cluster", preemption_rate}; }
151static inline void ?{} (cluster & this, const char name[])        { this{name, default_preemption()}; }
152
153static inline [cluster *&, cluster *& ] __get( cluster & this ) __attribute__((const)) { return this.node.[next, prev]; }
154
155static inline struct processor * active_processor() { return TL_GET( this_processor ); } // UNSAFE
156static inline struct cluster   * active_cluster  () { return TL_GET( this_processor )->cltr; }
157
158// Local Variables: //
159// mode: c //
160// tab-width: 4 //
161// End: //
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