source: src/libcfa/concurrency/kernel @ ea8b2f7

aaron-thesisarm-ehcleanup-dtorsdeferred_resndemanglerjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-exprnew-envno_listpersistent-indexerwith_gc
Last change on this file since ea8b2f7 was ea8b2f7, checked in by Thierry Delisle <tdelisle@…>, 4 years ago

Immetidate fix for halting processors, drifting still an issue

  • Property mode set to 100644
File size: 5.0 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 Apr 10 14:46:49 2018
13// Update Count     : 10
14//
15
16#pragma once
17
18#include <stdbool.h>
19
20#include "invoke.h"
21#include "time_t.h"
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 & this) {}
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        // Termination
116        // Set to true to notify the processor should terminate
117        volatile bool do_terminate;
118
119        // Termination synchronisation
120        semaphore terminated;
121
122        // RunThread data
123        // Action to do after a thread is ran
124        struct FinishAction finish;
125
126        // Preemption data
127        // Node which is added in the discrete event simulaiton
128        struct alarm_node_t * preemption_alarm;
129
130        // If true, a preemption was triggered in an unsafe region, the processor must preempt as soon as possible
131        bool pending_preemption;
132
133        // Idle lock
134        sem_t idleLock;
135        // __bin_sem_t idleLock;
136
137        // Link lists fields
138        struct __dbg_node_proc {
139                struct processor * next;
140                struct processor * prev;
141        } node;
142
143#ifdef __CFA_DEBUG__
144        // Last function to enable preemption on this processor
145        const char * last_enable;
146#endif
147};
148
149void  ?{}(processor & this, const char * name, struct cluster & cltr);
150void ^?{}(processor & this);
151
152static inline void  ?{}(processor & this)                    { this{ "Anonymous Processor", *mainCluster}; }
153static inline void  ?{}(processor & this, struct cluster & cltr)    { this{ "Anonymous Processor", cltr}; }
154static inline void  ?{}(processor & this, const char * name) { this{name, *mainCluster }; }
155
156static inline [processor *&, processor *& ] __get( processor & this ) {
157        return this.node.[next, prev];
158}
159
160//-----------------------------------------------------------------------------
161// Cluster
162struct cluster {
163        // Ready queue locks
164        __spinlock_t ready_queue_lock;
165
166        // Ready queue for threads
167        __queue_t(thread_desc) ready_queue;
168
169        // Name of the cluster
170        const char * name;
171
172        // Preemption rate on this cluster
173        Duration preemption_rate;
174
175        // List of processors
176        __spinlock_t proc_list_lock;
177        __dllist_t(struct processor) procs;
178        __dllist_t(struct processor) idles;
179
180        // List of processors
181        __spinlock_t thread_list_lock;
182        __dllist_t(struct thread_desc) threads;
183
184        // Link lists fields
185        struct __dbg_node_cltr {
186                cluster * next;
187                cluster * prev;
188        } node;
189};
190extern Duration default_preemption();
191
192void ?{} (cluster & this, const char * name, Duration preemption_rate);
193void ^?{}(cluster & this);
194
195static inline void ?{} (cluster & this)                           { this{"Anonymous Cluster", default_preemption()}; }
196static inline void ?{} (cluster & this, Duration preemption_rate) { this{"Anonymous Cluster", preemption_rate}; }
197static inline void ?{} (cluster & this, const char * name)        { this{name, default_preemption()}; }
198
199static inline [cluster *&, cluster *& ] __get( cluster & this ) {
200        return this.node.[next, prev];
201}
202
203// Local Variables: //
204// mode: c //
205// tab-width: 4 //
206// End: //
Note: See TracBrowser for help on using the repository browser.