source: libcfa/src/concurrency/invoke.h@ b0c7419

ADT arm-eh ast-experimental enum forall-pointer-decay jacob/cs343-translation jenkins-sandbox new-ast new-ast-unique-expr pthread-emulation qualifiedEnum
Last change on this file since b0c7419 was b0c7419, checked in by Thierry Delisle <tdelisle@…>, 6 years ago

Yield now uses force_yield instead of park/unpark.
Final ctxswitch of a thread now uses ad-hoc mechanism instead of park/unpark.
  • 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
20#ifdef __cforall
21extern "C" {
22#endif
23
24#if ! defined(__CFA_INVOKE_PRIVATE__)
25#ifndef _INVOKE_H_
26#define _INVOKE_H_
27
28#ifdef __ARM_ARCH
29 // function prototypes are only really used by these macros on ARM
30 void disable_global_interrupts();
31 void enable_global_interrupts();
32
33 #define TL_GET( member ) ( { __typeof__( kernelTLS.member ) target; \
34 disable_global_interrupts(); \
35 target = kernelTLS.member; \
36 enable_global_interrupts(); \
37 target; } )
38 #define TL_SET( member, value ) disable_global_interrupts(); \
39 kernelTLS.member = value; \
40 enable_global_interrupts();
41#else
42 #define TL_GET( member ) kernelTLS.member
43 #define TL_SET( member, value ) kernelTLS.member = value;
44#endif
45
46 #ifdef __cforall
47 extern "Cforall" {
48 extern __attribute__((aligned(128))) thread_local struct KernelThreadData {
49 struct thread_desc * volatile this_thread;
50 struct processor * volatile this_processor;
51
52 struct {
53 volatile unsigned short disable_count;
54 volatile bool enabled;
55 volatile bool in_progress;
56 } preemption_state;
57
58 uint32_t rand_seed;
59 } kernelTLS __attribute__ ((tls_model ( "initial-exec" )));
60 }
61 #endif
62
63 struct __stack_context_t {
64 void * SP;
65 void * FP;
66 };
67
68 // low adresses : +----------------------+ <- start of allocation
69 // | optional guard page |
70 // +----------------------+ <- __stack_t.limit
71 // | |
72 // | /\ /\ /\ |
73 // | || || || |
74 // | |
75 // | program stack |
76 // | |
77 // __stack_info_t.storage -> +----------------------+ <- __stack_t.base
78 // | __stack_t |
79 // high adresses : +----------------------+ <- end of allocation
80
81 struct __stack_t {
82 // stack grows towards stack limit
83 void * limit;
84
85 // base of stack
86 void * base;
87 };
88
89 struct __stack_info_t {
90 // pointer to stack
91 struct __stack_t * storage;
92 };
93
94 enum coroutine_state { Halted, Start, Primed, Inactive, Active, Rerun };
95 enum __Preemption_Reason { __NO_PREEMPTION, __ALARM_PREEMPTION, __POLL_PREEMPTION, __MANUAL_PREEMPTION };
96
97 struct coroutine_desc {
98 // context that is switch during a CtxSwitch
99 struct __stack_context_t context;
100
101 // stack information of the coroutine
102 struct __stack_info_t stack;
103
104 // textual name for coroutine/task
105 const char * name;
106
107 // current execution status for coroutine
108 enum coroutine_state state;
109
110 // first coroutine to resume this one
111 struct coroutine_desc * starter;
112
113 // last coroutine to resume this one
114 struct coroutine_desc * last;
115
116 // If non-null stack must be unwound with this exception
117 struct _Unwind_Exception * cancellation;
118
119 };
120
121 // struct which calls the monitor is accepting
122 struct __waitfor_mask_t {
123 // the index of the accepted function, -1 if none
124 short * accepted;
125
126 // list of acceptable functions, null if any
127 __cfa_anonymous_object( __small_array_t(struct __acceptable_t) );
128 };
129
130 struct monitor_desc {
131 // spinlock to protect internal data
132 struct __spinlock_t lock;
133
134 // current owner of the monitor
135 struct thread_desc * owner;
136
137 // queue of threads that are blocked waiting for the monitor
138 __queue_t(struct thread_desc) entry_queue;
139
140 // stack of conditions to run next once we exit the monitor
141 __stack_t(struct __condition_criterion_t) signal_stack;
142
143 // monitor routines can be called recursively, we need to keep track of that
144 unsigned int recursion;
145
146 // mask used to know if some thread is waiting for something while holding the monitor
147 struct __waitfor_mask_t mask;
148
149 // node used to signal the dtor in a waitfor dtor
150 struct __condition_node_t * dtor_node;
151 };
152
153 struct __monitor_group_t {
154 // currently held monitors
155 __cfa_anonymous_object( __small_array_t(monitor_desc*) );
156
157 // last function that acquired monitors
158 fptr_t func;
159 };
160
161 struct thread_desc {
162 // Core threading fields
163 // context that is switch during a CtxSwitch
164 struct __stack_context_t context;
165
166 // current execution status for coroutine
167 volatile int state;
168 enum __Preemption_Reason preempted;
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 // coroutine body used to store context
173 struct coroutine_desc self_cor;
174
175 // current active context
176 struct coroutine_desc * curr_cor;
177
178 // monitor body used for mutual exclusion
179 struct monitor_desc self_mon;
180
181 // pointer to monitor with sufficient lifetime for current monitors
182 struct monitor_desc * self_mon_p;
183
184 // pointer to the cluster on which the thread is running
185 struct cluster * curr_cluster;
186
187 // monitors currently held by this thread
188 struct __monitor_group_t monitors;
189
190 // Link lists fields
191 // instrusive link field for threads
192 struct thread_desc * next;
193
194 struct {
195 struct thread_desc * next;
196 struct thread_desc * prev;
197 } node;
198 };
199
200 #ifdef __cforall
201 extern "Cforall" {
202 static inline thread_desc *& get_next( thread_desc & this ) {
203 return this.next;
204 }
205
206 static inline [thread_desc *&, thread_desc *& ] __get( thread_desc & this ) {
207 return this.node.[next, prev];
208 }
209
210 static inline void ?{}(__monitor_group_t & this) {
211 (this.data){0p};
212 (this.size){0};
213 (this.func){NULL};
214 }
215
216 static inline void ?{}(__monitor_group_t & this, struct monitor_desc ** data, __lock_size_t size, fptr_t func) {
217 (this.data){data};
218 (this.size){size};
219 (this.func){func};
220 }
221
222 static inline bool ?==?( const __monitor_group_t & lhs, const __monitor_group_t & rhs ) {
223 if( (lhs.data != 0) != (rhs.data != 0) ) return false;
224 if( lhs.size != rhs.size ) return false;
225 if( lhs.func != rhs.func ) return false;
226
227 // Check that all the monitors match
228 for( int i = 0; i < lhs.size; i++ ) {
229 // If not a match, check next function
230 if( lhs[i] != rhs[i] ) return false;
231 }
232
233 return true;
234 }
235
236 static inline void ?=?(__monitor_group_t & lhs, const __monitor_group_t & rhs) {
237 lhs.data = rhs.data;
238 lhs.size = rhs.size;
239 lhs.func = rhs.func;
240 }
241 }
242 #endif
243
244#endif //_INVOKE_H_
245#else //! defined(__CFA_INVOKE_PRIVATE__)
246#ifndef _INVOKE_PRIVATE_H_
247#define _INVOKE_PRIVATE_H_
248
249 struct machine_context_t {
250 void *SP;
251 void *FP;
252 void *PC;
253 };
254
255 // assembler routines that performs the context switch
256 extern void CtxInvokeStub( void );
257 extern void CtxSwitch( struct __stack_context_t * from, struct __stack_context_t * to ) asm ("CtxSwitch");
258 // void CtxStore ( void * this ) asm ("CtxStore");
259 // void CtxRet ( void * dst ) asm ("CtxRet");
260
261#endif //_INVOKE_PRIVATE_H_
262#endif //! defined(__CFA_INVOKE_PRIVATE__)
263#ifdef __cforall
264}
265#endif
266
267// Local Variables: //
268// mode: c //
269// tab-width: 4 //
270// End: //
Note: See TracBrowser for help on using the repository browser.