source: libcfa/src/concurrency/thread.cfa @ 212c2187

arm-ehcleanup-dtorsjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-expr
Last change on this file since 212c2187 was 212c2187, checked in by tdelisle <tdelisle@…>, 3 years ago

Removed kernelTLS.this_coroutine which was redundant and some preleminary work for breaking into 2 step the context-switch

  • Property mode set to 100644
File size: 3.4 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 Mar 30 17:19:52 2018
13// Update Count     : 8
14//
15
16#include "thread.hfa"
17
18#include "kernel_private.hfa"
19
20#define __CFA_INVOKE_PRIVATE__
21#include "invoke.h"
22
23extern "C" {
24        #include <fenv.h>
25        #include <stddef.h>
26}
27
28//extern volatile thread_local processor * this_processor;
29
30//-----------------------------------------------------------------------------
31// Thread ctors and dtors
32void ?{}(thread_desc & this, const char * const name, cluster & cl, void * storage, size_t storageSize ) with( this ) {
33        self_cor{ name, storage, storageSize };
34        verify(&self_cor);
35        curr_cor = &self_cor;
36        self_mon.owner = &this;
37        self_mon.recursion = 1;
38        self_mon_p = &self_mon;
39        curr_cluster = &cl;
40        next = NULL;
41
42        node.next = NULL;
43        node.prev = NULL;
44        doregister(curr_cluster, this);
45
46        monitors{ &self_mon_p, 1, (fptr_t)0 };
47}
48
49void ^?{}(thread_desc& this) with( this ) {
50        unregister(curr_cluster, this);
51        ^self_cor{};
52}
53
54forall( dtype T | sized(T) | is_thread(T) | { void ?{}(T&); } )
55void ?{}( scoped(T)& this ) with( this ) {
56        handle{};
57        __thrd_start(handle);
58}
59
60forall( dtype T, ttype P | sized(T) | is_thread(T) | { void ?{}(T&, P); } )
61void ?{}( scoped(T)& this, P params ) with( this ) {
62        handle{ params };
63        __thrd_start(handle);
64}
65
66forall( dtype T | sized(T) | is_thread(T) )
67void ^?{}( scoped(T)& this ) with( this ) {
68        ^handle{};
69}
70
71//-----------------------------------------------------------------------------
72// Starting and stopping threads
73forall( dtype T | is_thread(T) )
74void __thrd_start( T& this ) {
75        coroutine_desc* thrd_c = get_coroutine(this);
76        thread_desc   * thrd_h = get_thread   (this);
77        thrd_c->last = TL_GET( this_thread )->curr_cor;
78
79        // __cfaabi_dbg_print_safe("Thread start : %p (t %p, c %p)\n", this, thrd_c, thrd_h);
80
81        disable_interrupts();
82        create_stack(&thrd_c->stack, thrd_c->stack.size);
83        CtxStart(&this, CtxInvokeThread);
84        assert( thrd_c->last->stack.context );
85        CtxSwitch( thrd_c->last->stack.context, thrd_c->stack.context );
86
87        ScheduleThread(thrd_h);
88        enable_interrupts( __cfaabi_dbg_ctx );
89}
90
91extern "C" {
92        // KERNEL ONLY
93        void __finish_creation(coroutine_desc * thrd_c) {
94                ThreadCtxSwitch( thrd_c, thrd_c->last );
95        }
96}
97
98void yield( void ) {
99        // Safety note : This could cause some false positives due to preemption
100      verify( TL_GET( preemption_state.enabled ) );
101        BlockInternal( TL_GET( this_thread ) );
102        // Safety note : This could cause some false positives due to preemption
103      verify( TL_GET( preemption_state.enabled ) );
104}
105
106void yield( unsigned times ) {
107        for( unsigned i = 0; i < times; i++ ) {
108                yield();
109        }
110}
111
112// KERNEL ONLY
113void ThreadCtxSwitch(coroutine_desc* src, coroutine_desc* dst) {
114        // set state of current coroutine to inactive
115        src->state = src->state == Halted ? Halted : Inactive;
116        dst->state = Active;
117
118        // set new coroutine that the processor is executing
119        // and context switch to it
120        assert( src->stack.context );
121        CtxSwitch( src->stack.context, dst->stack.context );
122
123        // set state of new coroutine to active
124        dst->state = dst->state == Halted ? Halted : Inactive;
125        src->state = Active;
126}
127
128// Local Variables: //
129// mode: c //
130// tab-width: 4 //
131// End: //
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