[78b3f52] | 1 | // |
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| 2 | // Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo |
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| 3 | // |
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| 4 | // The contents of this file are covered under the licence agreement in the |
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| 5 | // file "LICENCE" distributed with Cforall. |
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| 6 | // |
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[75a17f1] | 7 | // thread.c -- |
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[78b3f52] | 8 | // |
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| 9 | // Author : Thierry Delisle |
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[f07e037] | 10 | // Created On : Tue Jan 17 12:27:26 2017 |
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[6b0b624] | 11 | // Last Modified By : Peter A. Buhr |
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[25ef81d] | 12 | // Last Modified On : Sun Dec 11 20:56:54 2022 |
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| 13 | // Update Count : 102 |
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[78b3f52] | 14 | // |
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| 15 | |
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[2026bb6] | 16 | #define __cforall_thread__ |
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[43784ac] | 17 | #define _GNU_SOURCE |
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[2026bb6] | 18 | |
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[58b6d1b] | 19 | #include "thread.hfa" |
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[78b3f52] | 20 | |
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[ab8c6a6] | 21 | #include "exception.hfa" |
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[b035046] | 22 | #include "kernel/private.hfa" |
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| 23 | #include "limits.hfa" |
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[8118303] | 24 | |
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| 25 | #define __CFA_INVOKE_PRIVATE__ |
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| 26 | #include "invoke.h" |
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| 27 | |
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[dd46fd3] | 28 | extern size_t __global_random_seed; |
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| 29 | extern size_t __global_random_prime; |
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[d2ad151] | 30 | extern bool __global_random_mask; |
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[2210cfc] | 31 | |
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[c18bf9e] | 32 | #pragma GCC visibility push(default) |
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| 33 | |
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[8118303] | 34 | //----------------------------------------------------------------------------- |
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| 35 | // Thread ctors and dtors |
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[2210cfc] | 36 | void ?{}( thread$ & this, const char * const name, cluster & cl, void * storage, size_t storageSize ) with( this ) { |
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[121be3e] | 37 | context{ 0p, 0p }; |
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[de6319f] | 38 | self_cor{ name, storage, storageSize }; |
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[6a77224] | 39 | ticket = TICKET_RUNNING; |
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[e8e457e] | 40 | state = Start; |
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[3381ed7] | 41 | preempted = __NO_PREEMPTION; |
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[ab5baab] | 42 | corctx_flag = false; |
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[82c948c] | 43 | curr_cor = &self_cor; |
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[65deb18] | 44 | self_mon.owner = &this; |
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| 45 | self_mon.recursion = 1; |
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| 46 | self_mon_p = &self_mon; |
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[de6319f] | 47 | curr_cluster = &cl; |
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[15c93d8] | 48 | rdy_link.next = 0p; |
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| 49 | rdy_link.ts = MAX; |
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[1553a55] | 50 | user_link.next = 0p; |
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| 51 | user_link.prev = 0p; |
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| 52 | cltr_link.next = 0p; |
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| 53 | cltr_link.prev = 0p; |
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[24e321c] | 54 | preferred = ready_queue_new_preferred(); |
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[89eff25] | 55 | last_proc = 0p; |
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[dd46fd3] | 56 | PRNG_SET_SEED( random_state, __global_random_mask ? __global_random_prime : __global_random_prime ^ rdtscl() ); |
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[b4b63e8] | 57 | #if defined( __CFA_WITH_VERIFY__ ) |
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[878cfcc] | 58 | executing = 0p; |
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[ac12f1f] | 59 | canary = 0x0D15EA5E0D15EA5Ep; |
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[b4b63e8] | 60 | #endif |
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[de94a60] | 61 | |
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[015925a] | 62 | clh_node = malloc( ); |
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| 63 | *clh_node = false; |
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[f835806] | 64 | |
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| 65 | doregister(curr_cluster, this); |
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[65deb18] | 66 | monitors{ &self_mon_p, 1, (fptr_t)0 }; |
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[8118303] | 67 | } |
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| 68 | |
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[e84ab3d] | 69 | void ^?{}(thread$& this) with( this ) { |
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[b4b63e8] | 70 | #if defined( __CFA_WITH_VERIFY__ ) |
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[ac12f1f] | 71 | canary = 0xDEADDEADDEADDEADp; |
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[b4b63e8] | 72 | #endif |
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[015925a] | 73 | free(clh_node); |
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[a1a17a74] | 74 | unregister(curr_cluster, this); |
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[65deb18] | 75 | ^self_cor{}; |
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[8118303] | 76 | } |
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| 77 | |
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[fd54fef] | 78 | forall(T &) |
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[ab8c6a6] | 79 | void copy(ThreadCancelled(T) * dst, ThreadCancelled(T) * src) { |
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| 80 | dst->virtual_table = src->virtual_table; |
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| 81 | dst->the_thread = src->the_thread; |
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| 82 | dst->the_exception = src->the_exception; |
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| 83 | } |
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| 84 | |
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[fd54fef] | 85 | forall(T &) |
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[ab8c6a6] | 86 | const char * msg(ThreadCancelled(T) *) { |
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[ecfd758] | 87 | return "ThreadCancelled(...)"; |
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[ab8c6a6] | 88 | } |
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| 89 | |
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[fd54fef] | 90 | forall(T &) |
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[ab8c6a6] | 91 | static void default_thread_cancel_handler(ThreadCancelled(T) & ) { |
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[ecfd758] | 92 | // Improve this error message, can I do formatting? |
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[ab8c6a6] | 93 | abort( "Unhandled thread cancellation.\n" ); |
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| 94 | } |
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| 95 | |
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[c3b9d639] | 96 | forall(T & | is_thread(T) | IS_EXCEPTION(ThreadCancelled(T)) |
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| 97 | | { EHM_DEFAULT_VTABLE(ThreadCancelled(T)); }) |
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[ab8c6a6] | 98 | void ?{}( thread_dtor_guard_t & this, |
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[8edbe40] | 99 | T & thrd, void(*cancelHandler)(ThreadCancelled(T) &)) { |
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[e84ab3d] | 100 | monitor$ * m = get_monitor(thrd); |
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| 101 | thread$ * desc = get_thread(thrd); |
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[3ea8ad1] | 102 | |
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| 103 | // Setup the monitor guard |
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[ab8c6a6] | 104 | void (*dtor)(T& mutex this) = ^?{}; |
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[8edbe40] | 105 | bool join = cancelHandler != (void(*)(ThreadCancelled(T)&))0; |
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[ab8c6a6] | 106 | (this.mg){&m, (void(*)())dtor, join}; |
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[342be43] | 107 | |
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[3ea8ad1] | 108 | |
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| 109 | /* paranoid */ verifyf( Halted == desc->state || Cancelled == desc->state, "Expected thread to be Halted or Cancelled, was %d\n", (int)desc->state ); |
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| 110 | |
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[342be43] | 111 | // After the guard set-up and any wait, check for cancellation. |
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| 112 | struct _Unwind_Exception * cancellation = desc->self_cor.cancellation; |
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| 113 | if ( likely( 0p == cancellation ) ) { |
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| 114 | return; |
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| 115 | } else if ( Cancelled == desc->state ) { |
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| 116 | return; |
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| 117 | } |
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| 118 | desc->state = Cancelled; |
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[8edbe40] | 119 | void(*defaultResumptionHandler)(ThreadCancelled(T) &) = |
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[fcd0b9d7] | 120 | join ? cancelHandler : default_thread_cancel_handler; |
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[342be43] | 121 | |
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| 122 | // TODO: Remove explitate vtable set once trac#186 is fixed. |
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[8edbe40] | 123 | ThreadCancelled(T) except; |
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| 124 | except.virtual_table = &_default_vtable; |
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[342be43] | 125 | except.the_thread = &thrd; |
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| 126 | except.the_exception = __cfaehm_cancellation_exception( cancellation ); |
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[ecfd758] | 127 | // Why is this cast required? |
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[8edbe40] | 128 | throwResume (ThreadCancelled(T) &)except; |
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[342be43] | 129 | |
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| 130 | except.the_exception->virtual_table->free( except.the_exception ); |
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| 131 | free( cancellation ); |
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| 132 | desc->self_cor.cancellation = 0p; |
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[ab8c6a6] | 133 | } |
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| 134 | |
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| 135 | void ^?{}( thread_dtor_guard_t & this ) { |
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| 136 | ^(this.mg){}; |
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| 137 | } |
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| 138 | |
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[8118303] | 139 | //----------------------------------------------------------------------------- |
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| 140 | // Starting and stopping threads |
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[fd54fef] | 141 | forall( T & | is_thread(T) ) |
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[09f357ec] | 142 | void __thrd_start( T & this, void (*main_p)(T &) ) { |
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[e84ab3d] | 143 | thread$ * this_thrd = get_thread(this); |
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[8118303] | 144 | |
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[1c273d0] | 145 | disable_interrupts(); |
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[c7a900a] | 146 | __cfactx_start(main_p, get_coroutine(this), this, __cfactx_invoke_thread); |
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[09f357ec] | 147 | |
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[e8e457e] | 148 | this_thrd->context.[SP, FP] = this_thrd->self_cor.context.[SP, FP]; |
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[ac5816d] | 149 | /* paranoid */ verify( this_thrd->context.SP ); |
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[8118303] | 150 | |
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[24e321c] | 151 | schedule_thread$( this_thrd, UNPARK_LOCAL ); |
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[a3821fa] | 152 | enable_interrupts(); |
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[8118303] | 153 | } |
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| 154 | |
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[8c50aed] | 155 | //----------------------------------------------------------------------------- |
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| 156 | // Support for threads that don't ues the thread keyword |
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[fd54fef] | 157 | forall( T & | sized(T) | is_thread(T) | { void ?{}(T&); } ) |
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[65deb18] | 158 | void ?{}( scoped(T)& this ) with( this ) { |
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| 159 | handle{}; |
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[09f357ec] | 160 | __thrd_start(handle, main); |
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[bd98b58] | 161 | } |
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| 162 | |
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[fd54fef] | 163 | forall( T &, P... | sized(T) | is_thread(T) | { void ?{}(T&, P); } ) |
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[65deb18] | 164 | void ?{}( scoped(T)& this, P params ) with( this ) { |
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| 165 | handle{ params }; |
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[09f357ec] | 166 | __thrd_start(handle, main); |
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[8118303] | 167 | } |
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| 168 | |
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[fd54fef] | 169 | forall( T & | sized(T) | is_thread(T) ) |
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[65deb18] | 170 | void ^?{}( scoped(T)& this ) with( this ) { |
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| 171 | ^handle{}; |
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[44264c5] | 172 | } |
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| 173 | |
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[ab8c6a6] | 174 | //----------------------------------------------------------------------------- |
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[c3b9d639] | 175 | forall(T & | is_thread(T) | IS_RESUMPTION_EXCEPTION(ThreadCancelled(T)) |
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| 176 | | { EHM_DEFAULT_VTABLE(ThreadCancelled(T)); }) |
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[ab8c6a6] | 177 | T & join( T & this ) { |
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| 178 | thread_dtor_guard_t guard = { this, defaultResumptionHandler }; |
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| 179 | return this; |
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| 180 | } |
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| 181 | |
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[a167c70c] | 182 | //----------------------------------------------------------------------------- |
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| 183 | bool migrate( thread$ * thrd, struct cluster & cl ) { |
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| 184 | monitor$ * tmon = get_monitor(thrd); |
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| 185 | monitor$ * __monitors[] = { tmon }; |
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| 186 | monitor_guard_t __guard = { __monitors, 1 }; |
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| 187 | { |
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| 188 | // if nothing needs to be done, return false |
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| 189 | if( thrd->curr_cluster == &cl ) return false; |
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| 190 | |
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| 191 | // are we migrating ourself? |
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| 192 | const bool local = thrd == active_thread(); |
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| 193 | |
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| 194 | /* paranoid */ verify( !local || &cl != active_cluster() ); |
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| 195 | /* paranoid */ verify( !local || thrd->curr_cluster == active_cluster() ); |
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| 196 | /* paranoid */ verify( !local || thrd->curr_cluster == active_processor()->cltr ); |
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| 197 | /* paranoid */ verify( local || tmon->signal_stack.top->owner->waiting_thread == thrd ); |
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| 198 | /* paranoid */ verify( local || tmon->signal_stack.top ); |
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| 199 | |
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| 200 | // make sure we aren't interrupted while doing this |
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| 201 | // not as important if we aren't local |
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| 202 | disable_interrupts(); |
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| 203 | |
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| 204 | // actually move the thread |
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| 205 | unregister( thrd->curr_cluster, *thrd ); |
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| 206 | thrd->curr_cluster = &cl; |
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| 207 | doregister( thrd->curr_cluster, *thrd ); |
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| 208 | |
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| 209 | // restore interrupts |
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| 210 | enable_interrupts(); |
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| 211 | |
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| 212 | // if this is the local thread, we are still running on the old cluster |
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| 213 | if(local) yield(); |
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| 214 | |
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| 215 | /* paranoid */ verify( !local || &cl == active_cluster() ); |
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| 216 | /* paranoid */ verify( !local || thrd->curr_cluster == active_cluster() ); |
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| 217 | /* paranoid */ verify( !local || thrd->curr_cluster == active_processor()->cltr ); |
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| 218 | /* paranoid */ verify( local || tmon->signal_stack.top ); |
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| 219 | /* paranoid */ verify( local || tmon->signal_stack.top->owner->waiting_thread == thrd ); |
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| 220 | |
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| 221 | return true; |
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| 222 | } |
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| 223 | } |
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| 224 | |
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[5d1ebb9] | 225 | //----------------------------------------------------------------------------- |
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[2210cfc] | 226 | |
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[20cf96d] | 227 | void set_seed( size_t seed ) { |
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[dd46fd3] | 228 | PRNG_STATE_T & state = active_thread()->random_state; |
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| 229 | PRNG_SET_SEED( state, seed ); |
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[261e107] | 230 | __global_random_seed = seed; |
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[dd46fd3] | 231 | __global_random_prime = seed; |
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[c655650] | 232 | __global_random_mask = true; |
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[00f5fde] | 233 | } // set_seed |
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[12b5e94a] | 234 | |
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[20cf96d] | 235 | size_t prng( void ) { // [0,UINT_MAX] |
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[25ef81d] | 236 | return PRNG_NAME( active_thread()->random_state ); |
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[12b5e94a] | 237 | } // prng |
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[2210cfc] | 238 | |
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[78b3f52] | 239 | // Local Variables: // |
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| 240 | // mode: c // |
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| 241 | // tab-width: 4 // |
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[6a3d2e7] | 242 | // End: // |
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