source: libcfa/src/concurrency/invoke.h@ 82f4063

ADT ast-experimental enum forall-pointer-decay jacob/cs343-translation new-ast-unique-expr pthread-emulation qualifiedEnum
Last change on this file since 82f4063 was 82f4063, checked in by caparsons <caparson@…>, 4 years ago

switched unified locking to use dlist
  • Property mode set to 100644
File size: 8.3 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
22#include "containers/list.hfa"
23extern "C" {
24#endif
25
26#if ! defined(__CFA_INVOKE_PRIVATE__)
27#ifndef _INVOKE_H_
28#define _INVOKE_H_
29
30 struct __cfaehm_try_resume_node;
31 struct __cfaehm_base_exception_t;
32 struct exception_context_t {
33 struct __cfaehm_try_resume_node * top_resume;
34 struct __cfaehm_base_exception_t * current_exception;
35 };
36
37 struct __stack_context_t {
38 void * SP;
39 void * FP;
40 };
41
42 // low adresses : +----------------------+ <- start of allocation
43 // | optional guard page |
44 // +----------------------+ <- __stack_t.limit
45 // | |
46 // | /\ /\ /\ |
47 // | || || || |
48 // | |
49 // | program stack |
50 // | |
51 // __stack_info_t.storage -> +----------------------+ <- __stack_t.base
52 // | __stack_t |
53 // high adresses : +----------------------+ <- end of allocation
54
55 struct __stack_t {
56 // stack grows towards stack limit
57 void * limit;
58
59 // base of stack
60 void * base;
61
62 // Information for exception handling.
63 struct exception_context_t exception_context;
64 };
65
66 struct __stack_info_t {
67 // pointer to stack
68 struct __stack_t * storage;
69 };
70
71 enum __Coroutine_State { Halted, Start, Primed, Blocked, Ready, Active, Cancelled, Halting };
72
73 struct $coroutine {
74 // context that is switch during a __cfactx_switch
75 struct __stack_context_t context;
76
77 // stack information of the coroutine
78 struct __stack_info_t stack;
79
80 // textual name for coroutine/task
81 const char * name;
82
83 // current execution status for coroutine
84 enum __Coroutine_State state;
85
86 // first coroutine to resume this one
87 struct $coroutine * starter;
88
89 // last coroutine to resume this one
90 struct $coroutine * last;
91
92 // If non-null stack must be unwound with this exception
93 struct _Unwind_Exception * cancellation;
94
95 };
96 // Wrapper for gdb
97 struct cfathread_coroutine_t { struct $coroutine debug; };
98
99 static inline struct __stack_t * __get_stack( struct $coroutine * cor ) {
100 return (struct __stack_t*)(((uintptr_t)cor->stack.storage) & ((uintptr_t)-2));
101 }
102
103 // struct which calls the monitor is accepting
104 struct __waitfor_mask_t {
105 // the index of the accepted function, -1 if none
106 short * accepted;
107
108 // list of acceptable functions, null if any
109 __cfa_anonymous_object( __small_array_t(struct __acceptable_t) );
110 };
111
112 struct $monitor {
113 // spinlock to protect internal data
114 struct __spinlock_t lock;
115
116 // current owner of the monitor
117 struct $thread * owner;
118
119 // queue of threads that are blocked waiting for the monitor
120 __queue_t(struct $thread) entry_queue;
121
122 // stack of conditions to run next once we exit the monitor
123 __stack_t(struct __condition_criterion_t) signal_stack;
124
125 // monitor routines can be called recursively, we need to keep track of that
126 unsigned int recursion;
127
128 // mask used to know if some thread is waiting for something while holding the monitor
129 struct __waitfor_mask_t mask;
130
131 // node used to signal the dtor in a waitfor dtor
132 struct __condition_node_t * dtor_node;
133 };
134 // Wrapper for gdb
135 struct cfathread_monitor_t { struct $monitor debug; };
136
137 struct __monitor_group_t {
138 // currently held monitors
139 __cfa_anonymous_object( __small_array_t($monitor*) );
140
141 // last function that acquired monitors
142 fptr_t func;
143 };
144
145 // Link lists fields
146 // instrusive link field for threads
147 struct __thread_desc_link {
148 struct $thread * next;
149 volatile unsigned long long ts;
150 };
151
152 struct $thread {
153 // Core threading fields
154 // context that is switch during a __cfactx_switch
155 struct __stack_context_t context;
156
157 // Link lists fields
158 // instrusive link field for threads
159 struct __thread_desc_link link;
160
161 // current execution status for coroutine
162 // Possible values are:
163 // - TICKET_BLOCKED (-1) thread is blocked
164 // - TICKET_RUNNING ( 0) thread is running
165 // - TICKET_UNBLOCK ( 1) thread should ignore next block
166 volatile int ticket;
167 enum __Coroutine_State state:8;
168 enum __Preemption_Reason preempted:8;
169
170 //SKULLDUGGERY errno is not save in the thread data structure because returnToKernel appears to be the only function to require saving and restoring it
171
172 // pointer to the cluster on which the thread is running
173 struct cluster * curr_cluster;
174
175 // preferred ready-queue
176 unsigned preferred;
177
178 // coroutine body used to store context
179 struct $coroutine self_cor;
180
181 // current active context
182 struct $coroutine * curr_cor;
183
184 // monitor body used for mutual exclusion
185 struct $monitor self_mon;
186
187 // pointer to monitor with sufficient lifetime for current monitors
188 struct $monitor * self_mon_p;
189
190 // monitors currently held by this thread
191 struct __monitor_group_t monitors;
192
193 // used to put threads on user data structures
194 struct {
195 struct $thread * next;
196 struct $thread * back;
197 } seqable;
198
199 // used to put threads on dlist data structure
200 __cfa_dlink($thread);
201
202 struct {
203 struct $thread * next;
204 struct $thread * prev;
205 } node;
206
207 struct processor * last_proc;
208
209 #if defined( __CFA_WITH_VERIFY__ )
210 void * canary;
211 #endif
212 };
213 #ifdef __cforall
214 P9_EMBEDDED( $thread, dlink($thread) )
215 #endif
216 // Wrapper for gdb
217 struct cfathread_thread_t { struct $thread debug; };
218
219 #ifdef __CFA_DEBUG__
220 void __cfaabi_dbg_record_thrd($thread & this, bool park, const char prev_name[]);
221 #else
222 #define __cfaabi_dbg_record_thrd(x, y, z)
223 #endif
224
225 #ifdef __cforall
226 extern "Cforall" {
227
228 static inline $thread *& get_next( $thread & this ) __attribute__((const)) {
229 return this.link.next;
230 }
231
232 static inline [$thread *&, $thread *& ] __get( $thread & this ) __attribute__((const)) {
233 return this.node.[next, prev];
234 }
235
236 static inline $thread * volatile & ?`next ( $thread * this ) __attribute__((const)) {
237 return this->seqable.next;
238 }
239
240 static inline $thread *& Back( $thread * this ) __attribute__((const)) {
241 return this->seqable.back;
242 }
243
244 static inline $thread *& Next( $thread * this ) __attribute__((const)) {
245 return this->seqable.next;
246 }
247
248 static inline bool listed( $thread * this ) {
249 return this->seqable.next != 0p;
250 }
251
252 static inline void ?{}(__monitor_group_t & this) {
253 (this.data){0p};
254 (this.size){0};
255 (this.func){NULL};
256 }
257
258 static inline void ?{}(__monitor_group_t & this, struct $monitor ** data, __lock_size_t size, fptr_t func) {
259 (this.data){data};
260 (this.size){size};
261 (this.func){func};
262 }
263
264 static inline bool ?==?( const __monitor_group_t & lhs, const __monitor_group_t & rhs ) __attribute__((const)) {
265 if( (lhs.data != 0) != (rhs.data != 0) ) return false;
266 if( lhs.size != rhs.size ) return false;
267 if( lhs.func != rhs.func ) return false;
268
269 // Check that all the monitors match
270 for( int i = 0; i < lhs.size; i++ ) {
271 // If not a match, check next function
272 if( lhs[i] != rhs[i] ) return false;
273 }
274
275 return true;
276 }
277
278 static inline void ?=?(__monitor_group_t & lhs, const __monitor_group_t & rhs) {
279 lhs.data = rhs.data;
280 lhs.size = rhs.size;
281 lhs.func = rhs.func;
282 }
283 }
284 #endif
285
286#endif //_INVOKE_H_
287#else //! defined(__CFA_INVOKE_PRIVATE__)
288#ifndef _INVOKE_PRIVATE_H_
289#define _INVOKE_PRIVATE_H_
290
291 struct machine_context_t {
292 void *SP;
293 void *FP;
294 void *PC;
295 };
296
297 // assembler routines that performs the context switch
298 extern void __cfactx_invoke_stub( void );
299 extern void __cfactx_switch( struct __stack_context_t * from, struct __stack_context_t * to ) asm ("__cfactx_switch");
300 // void CtxStore ( void * this ) asm ("CtxStore");
301 // void CtxRet ( void * dst ) asm ("CtxRet");
302
303#endif //_INVOKE_PRIVATE_H_
304#endif //! defined(__CFA_INVOKE_PRIVATE__)
305#ifdef __cforall
306}
307#endif
308
309// Local Variables: //
310// mode: c //
311// tab-width: 4 //
312// End: //
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