source: src/libcfa/concurrency/thread.c @ c2b9f21

aaron-thesisarm-ehcleanup-dtorsdeferred_resndemanglerjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-exprnew-envno_listpersistent-indexerresolv-newwith_gc
Last change on this file since c2b9f21 was c2b9f21, checked in by Thierry Delisle <tdelisle@…>, 4 years ago

Removed libhdr, moved its content to bits

  • Property mode set to 100644
File size: 2.9 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// thread.c --
8//
9// Author           : Thierry Delisle
10// Created On       : Tue Jan 17 12:27:26 2017
11// Last Modified By : Peter A. Buhr
12// Last Modified On : Fri Jul 21 22:34:46 2017
13// Update Count     : 1
14//
15
16#include "thread"
17
18#include "kernel_private.h"
19
20#define __CFA_INVOKE_PRIVATE__
21#include "invoke.h"
22
23extern "C" {
24        #include <fenv.h>
25        #include <stddef.h>
26}
27
28extern volatile thread_local processor * this_processor;
29
30//-----------------------------------------------------------------------------
31// Thread ctors and dtors
32
33void ?{}(thread_desc& this) {
34        (this.self_cor){};
35        this.self_cor.name = "Anonymous Coroutine";
36        this.self_mon.owner = &this;
37        this.self_mon.recursion = 1;
38        this.self_mon_p = &this.self_mon;
39        this.next = NULL;
40
41        (this.monitors){ &this.self_mon_p, 1, (fptr_t)0 };
42}
43
44void ^?{}(thread_desc& this) {
45        ^(this.self_cor){};
46}
47
48forall( dtype T | sized(T) | is_thread(T) | { void ?{}(T&); } )
49void ?{}( scoped(T)& this ) {
50        (this.handle){};
51        __thrd_start(this.handle);
52}
53
54forall( dtype T, ttype P | sized(T) | is_thread(T) | { void ?{}(T&, P); } )
55void ?{}( scoped(T)& this, P params ) {
56        (this.handle){ params };
57        __thrd_start(this.handle);
58}
59
60forall( dtype T | sized(T) | is_thread(T) )
61void ^?{}( scoped(T)& this ) {
62        ^(this.handle){};
63}
64
65//-----------------------------------------------------------------------------
66// Starting and stopping threads
67forall( dtype T | is_thread(T) )
68void __thrd_start( T& this ) {
69        coroutine_desc* thrd_c = get_coroutine(this);
70        thread_desc*  thrd_h = get_thread   (this);
71        thrd_c->last = this_coroutine;
72
73        // __cfaabi_dbg_print_safe("Thread start : %p (t %p, c %p)\n", this, thrd_c, thrd_h);
74
75        disable_interrupts();
76        create_stack(&thrd_c->stack, thrd_c->stack.size);
77        this_coroutine = thrd_c;
78        CtxStart(&this, CtxInvokeThread);
79        assert( thrd_c->last->stack.context );
80        CtxSwitch( thrd_c->last->stack.context, thrd_c->stack.context );
81
82        ScheduleThread(thrd_h);
83        enable_interrupts( __cfaabi_dbg_ctx );
84}
85
86void yield( void ) {
87        BlockInternal( this_thread );
88}
89
90void yield( unsigned times ) {
91        for( unsigned i = 0; i < times; i++ ) {
92                yield();
93        }
94}
95
96void ThreadCtxSwitch(coroutine_desc* src, coroutine_desc* dst) {
97        // set state of current coroutine to inactive
98        src->state = src->state == Halted ? Halted : Inactive;
99        dst->state = Active;
100
101        //update the last resumer
102        dst->last = src;
103
104        // set new coroutine that the processor is executing
105        // and context switch to it
106        this_coroutine = dst;
107        assert( src->stack.context );
108        CtxSwitch( src->stack.context, dst->stack.context );
109        this_coroutine = src;
110
111        // set state of new coroutine to active
112        dst->state = dst->state == Halted ? Halted : Inactive;
113        src->state = Active;
114}
115
116// Local Variables: //
117// mode: c //
118// tab-width: 4 //
119// End: //
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