source: src/libcfa/concurrency/invoke.h @ 1c273d0

aaron-thesisarm-ehcleanup-dtorsdeferred_resndemanglerjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-exprnew-envno_listpersistent-indexerresolv-newwith_gc
Last change on this file since 1c273d0 was 1c273d0, checked in by Thierry Delisle <tdelisle@…>, 4 years ago

preemption works for threads

  • Property mode set to 100644
File size: 4.5 KB
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1//                              -*- Mode: C -*-
2//
3// Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo
4//
5// The contents of this file are covered under the licence agreement in the
6// file "LICENCE" distributed with Cforall.
7//
8// invoke.h --
9//
10// Author           : Thierry Delisle
11// Created On       : Tue Jan 17 12:27:26 2016
12// Last Modified By : Thierry Delisle
13// Last Modified On : --
14// Update Count     : 0
15//
16
17#include <stdbool.h>
18#include <stdint.h>
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      #define unlikely(x)    __builtin_expect(!!(x), 0)
29      #define thread_local _Thread_local
30
31      struct spinlock {
32            volatile int lock;
33            #ifdef __CFA_DEBUG__
34                  const char * prev;
35            #endif
36      };
37
38      struct __thread_queue_t {
39            struct thread_desc * head;
40            struct thread_desc ** tail;
41      };
42
43      struct __condition_stack_t {
44            struct __condition_criterion_t * top;
45      };
46
47      #ifdef __CFORALL__
48      extern "Cforall" {
49            void ?{}( struct __thread_queue_t * );
50            void append( struct __thread_queue_t *, struct thread_desc * );
51            struct thread_desc * pop_head( struct __thread_queue_t * );
52
53            void ?{}( struct __condition_stack_t * );
54            void push( struct __condition_stack_t *, struct __condition_criterion_t * );
55            struct __condition_criterion_t * pop( struct __condition_stack_t * );
56
57            void ?{}(spinlock * this);
58            void ^?{}(spinlock * this);
59      }
60      #endif
61
62      struct coStack_t {
63            unsigned int size;                        // size of stack
64            void *storage;                            // pointer to stack
65            void *limit;                              // stack grows towards stack limit
66            void *base;                               // base of stack
67            void *context;                            // address of cfa_context_t
68            void *top;                                // address of top of storage
69            bool userStack;                           // whether or not the user allocated the stack
70      };
71
72      enum coroutine_state { Halted, Start, Inactive, Active, Primed };
73
74      struct coroutine_desc {
75            struct coStack_t stack;                   // stack information of the coroutine
76            const char *name;                         // textual name for coroutine/task, initialized by uC++ generated code
77            int errno_;                               // copy of global UNIX variable errno
78            enum coroutine_state state;               // current execution status for coroutine
79            struct coroutine_desc *starter;           // first coroutine to resume this one
80            struct coroutine_desc *last;                    // last coroutine to resume this one
81      };
82
83      struct monitor_desc {
84            struct spinlock lock;                     // spinlock to protect internal data
85            struct thread_desc * owner;               // current owner of the monitor
86            struct __thread_queue_t entry_queue;      // queue of threads that are blocked waiting for the monitor
87            struct __condition_stack_t signal_stack;  // stack of conditions to run next once we exit the monitor
88            unsigned int recursion;                   // monitor routines can be called recursively, we need to keep track of that
89      };
90
91      struct thread_desc {
92            struct coroutine_desc cor;                // coroutine body used to store context
93            struct monitor_desc mon;                  // monitor body used for mutual exclusion
94            struct thread_desc * next;                // instrusive link field for threads
95            struct monitor_desc ** current_monitors;  // currently held monitors
96            unsigned short current_monitor_count;     // number of currently held monitors
97      };
98
99#endif //_INVOKE_H_
100#else //! defined(__CFA_INVOKE_PRIVATE__)
101#ifndef _INVOKE_PRIVATE_H_
102#define _INVOKE_PRIVATE_H_
103     
104      struct machine_context_t {
105            void *SP;
106            void *FP;
107            void *PC;
108      };
109
110      // assembler routines that performs the context switch
111      extern void CtxInvokeStub( void );
112      void CtxSwitch( void * from, void * to ) asm ("CtxSwitch");
113      void CtxGet( void * this ) asm ("CtxGet");
114
115#endif //_INVOKE_PRIVATE_H_
116#endif //! defined(__CFA_INVOKE_PRIVATE__)
117#ifdef __CFORALL__
118}
119#endif
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