source: libcfa/src/concurrency/invoke.h@ ab4a595

ADT ast-experimental enum forall-pointer-decay pthread-emulation qualifiedEnum
Last change on this file since ab4a595 was 24e321c, checked in by Thierry Delisle <tdelisle@…>, 4 years ago

Unpark now takes a hint on locality.
  • 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 bool corctx_flag;
171
172 //SKULLDUGGERY errno is not save in the thread data structure because returnToKernel appears to be the only function to require saving and restoring it
173
174 // pointer to the cluster on which the thread is running
175 struct cluster * curr_cluster;
176
177 // preferred ready-queue or CPU
178 unsigned preferred;
179
180 // coroutine body used to store context
181 struct coroutine$ self_cor;
182
183 // current active context
184 struct coroutine$ * curr_cor;
185
186 // monitor body used for mutual exclusion
187 struct monitor$ self_mon;
188
189 // pointer to monitor with sufficient lifetime for current monitors
190 struct monitor$ * self_mon_p;
191
192 // monitors currently held by this thread
193 struct __monitor_group_t monitors;
194
195 // used to put threads on user data structures
196 struct {
197 struct thread$ * next;
198 struct thread$ * back;
199 } seqable;
200
201 // used to put threads on dlist data structure
202 __cfa_dlink(thread$);
203
204 struct {
205 struct thread$ * next;
206 struct thread$ * prev;
207 } node;
208
209 struct processor * last_proc;
210
211 #if defined( __CFA_WITH_VERIFY__ )
212 void * canary;
213 #endif
214 };
215 #ifdef __cforall
216 P9_EMBEDDED( thread$, dlink(thread$) )
217 #endif
218 // Wrapper for gdb
219 struct cfathread_thread_t { struct thread$ debug; };
220
221 #ifdef __CFA_DEBUG__
222 void __cfaabi_dbg_record_thrd(thread$ & this, bool park, const char prev_name[]);
223 #else
224 #define __cfaabi_dbg_record_thrd(x, y, z)
225 #endif
226
227 #ifdef __cforall
228 extern "Cforall" {
229
230 static inline thread$ *& get_next( thread$ & this ) __attribute__((const)) {
231 return this.link.next;
232 }
233
234 static inline [thread$ *&, thread$ *& ] __get( thread$ & this ) __attribute__((const)) {
235 return this.node.[next, prev];
236 }
237
238 static inline thread$ * volatile & ?`next ( thread$ * this ) __attribute__((const)) {
239 return this->seqable.next;
240 }
241
242 static inline thread$ *& Back( thread$ * this ) __attribute__((const)) {
243 return this->seqable.back;
244 }
245
246 static inline thread$ *& Next( thread$ * this ) __attribute__((const)) {
247 return this->seqable.next;
248 }
249
250 static inline bool listed( thread$ * this ) {
251 return this->seqable.next != 0p;
252 }
253
254 static inline void ?{}(__monitor_group_t & this) {
255 (this.data){0p};
256 (this.size){0};
257 (this.func){NULL};
258 }
259
260 static inline void ?{}(__monitor_group_t & this, struct monitor$ ** data, __lock_size_t size, fptr_t func) {
261 (this.data){data};
262 (this.size){size};
263 (this.func){func};
264 }
265
266 static inline bool ?==?( const __monitor_group_t & lhs, const __monitor_group_t & rhs ) __attribute__((const)) {
267 if( (lhs.data != 0) != (rhs.data != 0) ) return false;
268 if( lhs.size != rhs.size ) return false;
269 if( lhs.func != rhs.func ) return false;
270
271 // Check that all the monitors match
272 for( int i = 0; i < lhs.size; i++ ) {
273 // If not a match, check next function
274 if( lhs[i] != rhs[i] ) return false;
275 }
276
277 return true;
278 }
279
280 static inline void ?=?(__monitor_group_t & lhs, const __monitor_group_t & rhs) {
281 lhs.data = rhs.data;
282 lhs.size = rhs.size;
283 lhs.func = rhs.func;
284 }
285 }
286 #endif
287
288#endif //_INVOKE_H_
289#else //! defined(__CFA_INVOKE_PRIVATE__)
290#ifndef _INVOKE_PRIVATE_H_
291#define _INVOKE_PRIVATE_H_
292
293 struct machine_context_t {
294 void *SP;
295 void *FP;
296 void *PC;
297 };
298
299 // assembler routines that performs the context switch
300 extern void __cfactx_invoke_stub( void );
301 extern void __cfactx_switch( struct __stack_context_t * from, struct __stack_context_t * to ) asm ("__cfactx_switch");
302 // void CtxStore ( void * this ) asm ("CtxStore");
303 // void CtxRet ( void * dst ) asm ("CtxRet");
304
305#endif //_INVOKE_PRIVATE_H_
306#endif //! defined(__CFA_INVOKE_PRIVATE__)
307#ifdef __cforall
308}
309#endif
310
311// Local Variables: //
312// mode: c //
313// tab-width: 4 //
314// End: //
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