source: libcfa/src/concurrency/kernel.hfa @ d4e68a6

arm-ehjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-expr
Last change on this file since d4e68a6 was d4e68a6, checked in by Peter A. Buhr <pabuhr@…>, 3 years ago

move location of active_xxx routines, and counter for number processors on a cluster

  • Property mode set to 100644
File size: 5.2 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 : Sat Jun 22 11:39:17 2019
13// Update Count     : 16
14//
15
16#pragma once
17
18#include <stdbool.h>
19
20#include "invoke.h"
21#include "time_t.hfa"
22
23extern "C" {
24#include <pthread.h>
25#include <semaphore.h>
26}
27
28//-----------------------------------------------------------------------------
29// Locks
30struct semaphore {
31        __spinlock_t lock;
32        int count;
33        __queue_t(thread_desc) waiting;
34};
35
36void  ?{}(semaphore & this, int count = 1);
37void ^?{}(semaphore & this);
38void   P (semaphore & this);
39void   V (semaphore & this);
40
41
42//-----------------------------------------------------------------------------
43// Processor
44extern struct cluster * mainCluster;
45
46enum FinishOpCode { No_Action, Release, Schedule, Release_Schedule, Release_Multi, Release_Multi_Schedule, Callback };
47
48typedef void (*__finish_callback_fptr_t)(void);
49
50//TODO use union, many of these fields are mutually exclusive (i.e. MULTI vs NOMULTI)
51struct FinishAction {
52        FinishOpCode action_code;
53        /*
54        // Union of possible actions
55        union {
56                // Option 1 : locks and threads
57                struct {
58                        // 1 thread or N thread
59                        union {
60                                thread_desc * thrd;
61                                struct {
62                                        thread_desc ** thrds;
63                                        unsigned short thrd_count;
64                                };
65                        };
66                        // 1 lock or N lock
67                        union {
68                                __spinlock_t * lock;
69                                struct {
70                                        __spinlock_t ** locks;
71                                        unsigned short lock_count;
72                                };
73                        };
74                };
75                // Option 2 : action pointer
76                __finish_callback_fptr_t callback;
77        };
78        /*/
79        thread_desc * thrd;
80        thread_desc ** thrds;
81        unsigned short thrd_count;
82        __spinlock_t * lock;
83        __spinlock_t ** locks;
84        unsigned short lock_count;
85        __finish_callback_fptr_t callback;
86        //*/
87};
88static inline void ?{}(FinishAction & this) {
89        this.action_code = No_Action;
90        this.thrd = NULL;
91        this.lock = NULL;
92}
93static inline void ^?{}(FinishAction &) {}
94
95// Processor
96coroutine processorCtx_t {
97        struct processor * proc;
98};
99
100// Wrapper around kernel threads
101struct processor {
102        // Main state
103        // Coroutine ctx who does keeps the state of the processor
104        struct processorCtx_t runner;
105
106        // Cluster from which to get threads
107        struct cluster * cltr;
108
109        // Name of the processor
110        const char * name;
111
112        // Handle to pthreads
113        pthread_t kernel_thread;
114
115        // RunThread data
116        // Action to do after a thread is ran
117        struct FinishAction finish;
118
119        // Preemption data
120        // Node which is added in the discrete event simulaiton
121        struct alarm_node_t * preemption_alarm;
122
123        // If true, a preemption was triggered in an unsafe region, the processor must preempt as soon as possible
124        bool pending_preemption;
125
126        // Idle lock
127        __bin_sem_t idleLock;
128
129        // Termination
130        // Set to true to notify the processor should terminate
131        volatile bool do_terminate;
132
133        // Termination synchronisation
134        semaphore terminated;
135
136        // Link lists fields
137        struct __dbg_node_proc {
138                struct processor * next;
139                struct processor * prev;
140        } node;
141
142#ifdef __CFA_DEBUG__
143        // Last function to enable preemption on this processor
144        const char * last_enable;
145#endif
146};
147
148void  ?{}(processor & this, const char * name, struct cluster & cltr);
149void ^?{}(processor & this);
150
151static inline void  ?{}(processor & this)                    { this{ "Anonymous Processor", *mainCluster}; }
152static inline void  ?{}(processor & this, struct cluster & cltr)    { this{ "Anonymous Processor", cltr}; }
153static inline void  ?{}(processor & this, const char * name) { this{name, *mainCluster }; }
154
155static inline [processor *&, processor *& ] __get( processor & this ) {
156        return this.node.[next, prev];
157}
158
159//-----------------------------------------------------------------------------
160// Cluster
161struct cluster {
162        // Ready queue locks
163        __spinlock_t ready_queue_lock;
164
165        // Ready queue for threads
166        __queue_t(thread_desc) ready_queue;
167
168        // Name of the cluster
169        const char * name;
170
171        // Preemption rate on this cluster
172        Duration preemption_rate;
173
174        // List of processors
175        __spinlock_t proc_list_lock;
176        __dllist_t(struct processor) procs;
177        __dllist_t(struct processor) idles;
178        unsigned int nprocessors;
179
180        // List of threads
181        __spinlock_t thread_list_lock;
182        __dllist_t(struct thread_desc) threads;
183        unsigned int nthreads;
184
185        // Link lists fields
186        struct __dbg_node_cltr {
187                cluster * next;
188                cluster * prev;
189        } node;
190};
191extern Duration default_preemption();
192
193void ?{} (cluster & this, const char * name, Duration preemption_rate);
194void ^?{}(cluster & this);
195
196static inline void ?{} (cluster & this)                           { this{"Anonymous Cluster", default_preemption()}; }
197static inline void ?{} (cluster & this, Duration preemption_rate) { this{"Anonymous Cluster", preemption_rate}; }
198static inline void ?{} (cluster & this, const char * name)        { this{name, default_preemption()}; }
199
200static inline [cluster *&, cluster *& ] __get( cluster & this ) {
201        return this.node.[next, prev];
202}
203
204static inline struct processor * active_processor() { return TL_GET( this_processor ); } // UNSAFE
205static inline struct cluster   * active_cluster  () { return TL_GET( this_processor )->cltr; }
206
207// Local Variables: //
208// mode: c //
209// tab-width: 4 //
210// End: //
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