source: libcfa/src/concurrency/invoke.h@ 22b7579

ADT arm-eh ast-experimental enum forall-pointer-decay jacob/cs343-translation new-ast-unique-expr pthread-emulation qualifiedEnum
Last change on this file since 22b7579 was d3314ae, checked in by Thierry Delisle <tdelisle@…>, 4 years ago

Threads can now be queued onto the lock-free queues directly.
  • Property mode set to 100644
File size: 8.1 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// invoke.h --
8//
9// Author : Thierry Delisle
10// Created On : Tue Jan 17 12:27:26 2016
11// Last Modified By : Peter A. Buhr
12// Last Modified On : Thu Dec 5 16:26:03 2019
13// Update Count : 44
14//
15
16#include "bits/containers.hfa"
17#include "bits/defs.hfa"
18#include "bits/locks.hfa"
19#include "kernel/fwd.hfa"
20
21#ifdef __cforall
22extern "C" {
23#endif
24
25#if ! defined(__CFA_INVOKE_PRIVATE__)
26#ifndef _INVOKE_H_
27#define _INVOKE_H_
28
29 struct __cfaehm_try_resume_node;
30 struct __cfaehm_base_exception_t;
31 struct exception_context_t {
32 struct __cfaehm_try_resume_node * top_resume;
33 struct __cfaehm_base_exception_t * current_exception;
34 };
35
36 struct __stack_context_t {
37 void * SP;
38 void * FP;
39 };
40
41 // low adresses : +----------------------+ <- start of allocation
42 // | optional guard page |
43 // +----------------------+ <- __stack_t.limit
44 // | |
45 // | /\ /\ /\ |
46 // | || || || |
47 // | |
48 // | program stack |
49 // | |
50 // __stack_info_t.storage -> +----------------------+ <- __stack_t.base
51 // | __stack_t |
52 // high adresses : +----------------------+ <- end of allocation
53
54 struct __stack_t {
55 // stack grows towards stack limit
56 void * limit;
57
58 // base of stack
59 void * base;
60
61 // Information for exception handling.
62 struct exception_context_t exception_context;
63 };
64
65 struct __stack_info_t {
66 // pointer to stack
67 struct __stack_t * storage;
68 };
69
70 enum __Coroutine_State { Halted, Start, Primed, Blocked, Ready, Active, Cancelled, Halting };
71
72 struct $coroutine {
73 // context that is switch during a __cfactx_switch
74 struct __stack_context_t context;
75
76 // stack information of the coroutine
77 struct __stack_info_t stack;
78
79 // textual name for coroutine/task
80 const char * name;
81
82 // current execution status for coroutine
83 enum __Coroutine_State state;
84
85 // first coroutine to resume this one
86 struct $coroutine * starter;
87
88 // last coroutine to resume this one
89 struct $coroutine * last;
90
91 // If non-null stack must be unwound with this exception
92 struct _Unwind_Exception * cancellation;
93
94 };
95 // Wrapper for gdb
96 struct cfathread_coroutine_t { struct $coroutine debug; };
97
98 static inline struct __stack_t * __get_stack( struct $coroutine * cor ) {
99 return (struct __stack_t*)(((uintptr_t)cor->stack.storage) & ((uintptr_t)-2));
100 }
101
102 // struct which calls the monitor is accepting
103 struct __waitfor_mask_t {
104 // the index of the accepted function, -1 if none
105 short * accepted;
106
107 // list of acceptable functions, null if any
108 __cfa_anonymous_object( __small_array_t(struct __acceptable_t) );
109 };
110
111 struct $monitor {
112 // spinlock to protect internal data
113 struct __spinlock_t lock;
114
115 // current owner of the monitor
116 struct $thread * owner;
117
118 // queue of threads that are blocked waiting for the monitor
119 __queue_t(struct $thread) entry_queue;
120
121 // stack of conditions to run next once we exit the monitor
122 __stack_t(struct __condition_criterion_t) signal_stack;
123
124 // monitor routines can be called recursively, we need to keep track of that
125 unsigned int recursion;
126
127 // mask used to know if some thread is waiting for something while holding the monitor
128 struct __waitfor_mask_t mask;
129
130 // node used to signal the dtor in a waitfor dtor
131 struct __condition_node_t * dtor_node;
132 };
133 // Wrapper for gdb
134 struct cfathread_monitor_t { struct $monitor debug; };
135
136 struct __monitor_group_t {
137 // currently held monitors
138 __cfa_anonymous_object( __small_array_t($monitor*) );
139
140 // last function that acquired monitors
141 fptr_t func;
142 };
143
144 // Link lists fields
145 // instrusive link field for threads
146 struct __thread_desc_link {
147 struct $thread * next;
148 struct $thread * prev;
149 volatile unsigned long long ts;
150 int preferred;
151 };
152
153 struct $thread {
154 // Core threading fields
155 // context that is switch during a __cfactx_switch
156 struct __stack_context_t context;
157
158 // current execution status for coroutine
159 // Possible values are:
160 // - TICKET_BLOCKED (-1) thread is blocked
161 // - TICKET_RUNNING ( 0) thread is running
162 // - TICKET_UNBLOCK ( 1) thread should ignore next block
163 volatile int ticket;
164 enum __Coroutine_State state:8;
165 enum __Preemption_Reason preempted:8;
166
167 //SKULLDUGGERY errno is not save in the thread data structure because returnToKernel appears to be the only function to require saving and restoring it
168
169 // pointer to the cluster on which the thread is running
170 struct cluster * curr_cluster;
171
172 // Link lists fields
173 // instrusive link field for threads
174 struct __thread_desc_link link;
175
176 // coroutine body used to store context
177 struct $coroutine self_cor;
178
179 // current active context
180 struct $coroutine * curr_cor;
181
182 // monitor body used for mutual exclusion
183 struct $monitor self_mon;
184
185 // pointer to monitor with sufficient lifetime for current monitors
186 struct $monitor * self_mon_p;
187
188 // monitors currently held by this thread
189 struct __monitor_group_t monitors;
190
191 // used to put threads on user data structures
192 struct {
193 struct $thread * next;
194 struct $thread * back;
195 } seqable;
196
197 struct {
198 struct $thread * next;
199 struct $thread * prev;
200 } node;
201
202 #if defined( __CFA_WITH_VERIFY__ )
203 void * canary;
204 #endif
205 };
206 // Wrapper for gdb
207 struct cfathread_thread_t { struct $thread debug; };
208
209 #ifdef __CFA_DEBUG__
210 void __cfaabi_dbg_record_thrd($thread & this, bool park, const char prev_name[]);
211 #else
212 #define __cfaabi_dbg_record_thrd(x, y, z)
213 #endif
214
215 #ifdef __cforall
216 extern "Cforall" {
217
218 static inline $thread *& get_next( $thread & this ) __attribute__((const)) {
219 return this.link.next;
220 }
221
222 static inline [$thread *&, $thread *& ] __get( $thread & this ) __attribute__((const)) {
223 return this.node.[next, prev];
224 }
225
226 static inline $thread * volatile & ?`next ( $thread * this ) __attribute__((const)) {
227 return this->seqable.next;
228 }
229
230 static inline $thread *& Back( $thread * this ) __attribute__((const)) {
231 return this->seqable.back;
232 }
233
234 static inline $thread *& Next( $thread * this ) __attribute__((const)) {
235 return this->seqable.next;
236 }
237
238 static inline bool listed( $thread * this ) {
239 return this->seqable.next != 0p;
240 }
241
242 static inline void ?{}(__monitor_group_t & this) {
243 (this.data){0p};
244 (this.size){0};
245 (this.func){NULL};
246 }
247
248 static inline void ?{}(__monitor_group_t & this, struct $monitor ** data, __lock_size_t size, fptr_t func) {
249 (this.data){data};
250 (this.size){size};
251 (this.func){func};
252 }
253
254 static inline bool ?==?( const __monitor_group_t & lhs, const __monitor_group_t & rhs ) __attribute__((const)) {
255 if( (lhs.data != 0) != (rhs.data != 0) ) return false;
256 if( lhs.size != rhs.size ) return false;
257 if( lhs.func != rhs.func ) return false;
258
259 // Check that all the monitors match
260 for( int i = 0; i < lhs.size; i++ ) {
261 // If not a match, check next function
262 if( lhs[i] != rhs[i] ) return false;
263 }
264
265 return true;
266 }
267
268 static inline void ?=?(__monitor_group_t & lhs, const __monitor_group_t & rhs) {
269 lhs.data = rhs.data;
270 lhs.size = rhs.size;
271 lhs.func = rhs.func;
272 }
273 }
274 #endif
275
276#endif //_INVOKE_H_
277#else //! defined(__CFA_INVOKE_PRIVATE__)
278#ifndef _INVOKE_PRIVATE_H_
279#define _INVOKE_PRIVATE_H_
280
281 struct machine_context_t {
282 void *SP;
283 void *FP;
284 void *PC;
285 };
286
287 // assembler routines that performs the context switch
288 extern void __cfactx_invoke_stub( void );
289 extern void __cfactx_switch( struct __stack_context_t * from, struct __stack_context_t * to ) asm ("__cfactx_switch");
290 // void CtxStore ( void * this ) asm ("CtxStore");
291 // void CtxRet ( void * dst ) asm ("CtxRet");
292
293#endif //_INVOKE_PRIVATE_H_
294#endif //! defined(__CFA_INVOKE_PRIVATE__)
295#ifdef __cforall
296}
297#endif
298
299// Local Variables: //
300// mode: c //
301// tab-width: 4 //
302// End: //
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