source: libcfa/src/concurrency/invoke.h@ 4998155

ADT arm-eh ast-experimental enum forall-pointer-decay jacob/cs343-translation new-ast new-ast-unique-expr pthread-emulation qualifiedEnum
Last change on this file since 4998155 was 80ec409, checked in by Andrew Beach <ajbeach@…>, 5 years ago

The exception context is now stored on the stack. It is not used just yet.
  • Property mode set to 100644
File size: 7.3 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
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 };
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
96 static inline struct __stack_t * __get_stack( struct $coroutine * cor ) {
97 return (struct __stack_t*)(((uintptr_t)cor->stack.storage) & ((uintptr_t)-2));
98 }
99
100 // struct which calls the monitor is accepting
101 struct __waitfor_mask_t {
102 // the index of the accepted function, -1 if none
103 short * accepted;
104
105 // list of acceptable functions, null if any
106 __cfa_anonymous_object( __small_array_t(struct __acceptable_t) );
107 };
108
109 struct $monitor {
110 // spinlock to protect internal data
111 struct __spinlock_t lock;
112
113 // current owner of the monitor
114 struct $thread * owner;
115
116 // queue of threads that are blocked waiting for the monitor
117 __queue_t(struct $thread) entry_queue;
118
119 // stack of conditions to run next once we exit the monitor
120 __stack_t(struct __condition_criterion_t) signal_stack;
121
122 // monitor routines can be called recursively, we need to keep track of that
123 unsigned int recursion;
124
125 // mask used to know if some thread is waiting for something while holding the monitor
126 struct __waitfor_mask_t mask;
127
128 // node used to signal the dtor in a waitfor dtor
129 struct __condition_node_t * dtor_node;
130 };
131
132 struct __monitor_group_t {
133 // currently held monitors
134 __cfa_anonymous_object( __small_array_t($monitor*) );
135
136 // last function that acquired monitors
137 fptr_t func;
138 };
139
140 // Link lists fields
141 // instrusive link field for threads
142 struct __thread_desc_link {
143 struct $thread * next;
144 struct $thread * prev;
145 volatile unsigned long long ts;
146 int preferred;
147 };
148
149 struct $thread {
150 // Core threading fields
151 // context that is switch during a __cfactx_switch
152 struct __stack_context_t context;
153
154 // current execution status for coroutine
155 volatile int ticket;
156 enum __Coroutine_State state:8;
157 enum __Preemption_Reason preempted:8;
158
159 //SKULLDUGGERY errno is not save in the thread data structure because returnToKernel appears to be the only function to require saving and restoring it
160
161 // pointer to the cluster on which the thread is running
162 struct cluster * curr_cluster;
163
164 // Link lists fields
165 // instrusive link field for threads
166 struct __thread_desc_link link;
167
168 // coroutine body used to store context
169 struct $coroutine self_cor;
170
171 // current active context
172 struct $coroutine * curr_cor;
173
174 // monitor body used for mutual exclusion
175 struct $monitor self_mon;
176
177 // pointer to monitor with sufficient lifetime for current monitors
178 struct $monitor * self_mon_p;
179
180 // monitors currently held by this thread
181 struct __monitor_group_t monitors;
182
183 struct {
184 struct $thread * next;
185 struct $thread * prev;
186 } node;
187
188 #ifdef __CFA_DEBUG__
189 // previous function to park/unpark the thread
190 const char * park_caller;
191 int park_result;
192 enum __Coroutine_State park_state;
193 bool park_stale;
194 const char * unpark_caller;
195 int unpark_result;
196 enum __Coroutine_State unpark_state;
197 bool unpark_stale;
198 #endif
199 };
200
201 #ifdef __CFA_DEBUG__
202 void __cfaabi_dbg_record_thrd($thread & this, bool park, const char prev_name[]);
203 #else
204 #define __cfaabi_dbg_record_thrd(x, y, z)
205 #endif
206
207 #ifdef __cforall
208 extern "Cforall" {
209
210 static inline $thread *& get_next( $thread & this ) __attribute__((const)) {
211 return this.link.next;
212 }
213
214 static inline [$thread *&, $thread *& ] __get( $thread & this ) __attribute__((const)) {
215 return this.node.[next, prev];
216 }
217
218 static inline void ?{}(__monitor_group_t & this) {
219 (this.data){0p};
220 (this.size){0};
221 (this.func){NULL};
222 }
223
224 static inline void ?{}(__monitor_group_t & this, struct $monitor ** data, __lock_size_t size, fptr_t func) {
225 (this.data){data};
226 (this.size){size};
227 (this.func){func};
228 }
229
230 static inline bool ?==?( const __monitor_group_t & lhs, const __monitor_group_t & rhs ) __attribute__((const)) {
231 if( (lhs.data != 0) != (rhs.data != 0) ) return false;
232 if( lhs.size != rhs.size ) return false;
233 if( lhs.func != rhs.func ) return false;
234
235 // Check that all the monitors match
236 for( int i = 0; i < lhs.size; i++ ) {
237 // If not a match, check next function
238 if( lhs[i] != rhs[i] ) return false;
239 }
240
241 return true;
242 }
243
244 static inline void ?=?(__monitor_group_t & lhs, const __monitor_group_t & rhs) {
245 lhs.data = rhs.data;
246 lhs.size = rhs.size;
247 lhs.func = rhs.func;
248 }
249 }
250 #endif
251
252#endif //_INVOKE_H_
253#else //! defined(__CFA_INVOKE_PRIVATE__)
254#ifndef _INVOKE_PRIVATE_H_
255#define _INVOKE_PRIVATE_H_
256
257 struct machine_context_t {
258 void *SP;
259 void *FP;
260 void *PC;
261 };
262
263 // assembler routines that performs the context switch
264 extern void __cfactx_invoke_stub( void );
265 extern void __cfactx_switch( struct __stack_context_t * from, struct __stack_context_t * to ) asm ("__cfactx_switch");
266 // void CtxStore ( void * this ) asm ("CtxStore");
267 // void CtxRet ( void * dst ) asm ("CtxRet");
268
269#endif //_INVOKE_PRIVATE_H_
270#endif //! defined(__CFA_INVOKE_PRIVATE__)
271#ifdef __cforall
272}
273#endif
274
275// Local Variables: //
276// mode: c //
277// tab-width: 4 //
278// End: //
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