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authordnovillo <dnovillo@138bc75d-0d04-0410-961f-82ee72b054a4>2006-01-18 19:21:25 +0000
committerdnovillo <dnovillo@138bc75d-0d04-0410-961f-82ee72b054a4>2006-01-18 19:21:25 +0000
commit1e8e992020adfba209ef30b3c369e2ca6282d837 (patch)
treeb7647b4100a528e9911385ca6d0d57a23899ae2c /libgomp/team.c
parent14efb9b7b52e816aa93ea4a451b5c10eb7634a8b (diff)
downloadgcc-1e8e992020adfba209ef30b3c369e2ca6282d837.tar.gz
2006-01-18 Richard Henderson <rth@redhat.com>
Jakub Jelinek <jakub@redhat.com> Diego Novillo <dnovillo@redhat.com> * libgomp: New directory. * Makefile.def: Add target_module libgomp. * Makefile.in: Regenerate. * configure.in (target_libraries): Add target-libgomp. * configure: Regenerate. contrib/ 2006-01-18 Richard Henderson <rth@redhat.com> Diego Novillo <dnovillo@redhat.com> * gcc_update (files_and_dependencies): Add libgomp files. gcc/ 2006-01-18 Richard Henderson <rth@redhat.com> Aldy Hernandez <aldyh@redhat.com> Jakub Jelinek <jakub@redhat.com> Diego Novillo <dnovillo@redhat.com> * omp-low.c: New file. * c-omp.c: New file. 2006-01-18 Richard Henderson <rth@redhat.com> Jakub Jelinek <jakub@redhat.com> Diego Novillo <dnovillo@redhat.com> * doc/invoke.texi: Document -fopenmp. * tree-dump.h (debug_function): Declare. * hooks.c (hook_bool_tree_bool_false): New function. (hook_tree_tree_null): Remove. (hook_tree_tree_tree_null): New. * hooks.h: Update to match. * tree-pretty-print.c (debug_tree_chain): New. (print_generic_expr): Handle TDF_CHAIN. (dump_generic_node): Handle BLOCK. Do not abort with incomplete SWITCH_EXPRs. Do not dump body of an OpenMP directive if TDF_SLIM is given. <case OMP_PARALLEL, OMP_FOR, OMP_SECTIONS>: Don't print space after directive name. <OMP_FOR>: Handle printing OMP_FOR_PRE_BODY. Handle OMP_MASTER and OMP_ORDERED. Handle printing of OMP_BODY just in one place, goto dump_omp_body in the rest of OMP_* nodes that have OMP_BODY. Don't handle clause nodes here. Update omp statements to use dump_omp_clauses. Handle OMP_SINGLE, OMP_SECTIONS, OMP_SECTION, OMP_CLAUSE_ORDERED, OMP_CLAUSE_SCHEDULE, OMP_ATOMIC, OMP_CRITICAL, OMP_CLAUSE_NOWAIT, GOMP_CLAUSE_IF, GOMP_CLAUSE_NUM_THREADS, GOMP_FOR, GOMP_CLAUSE_SHARED, GOMP_CLAUSE_FIRSTPRIVATE, GOMP_CLAUSE_LASTPRIVATE, GOMP_CLAUSE_COPYIN and GOMP_CLAUSE_COPYPRIVATE. Adjust output for GOMP_PARALLEL. (dump_omp_clauses): New. (print_declaration): Dump DECL_VALUE_EXPR. (op_symbol_1): Split out of op_symbol. (dumping_stmts): Remove. Update all users. * cgraph.c (cgraph_analyze_queue): New. (cgraph_add_new_function): New. * cgraph.h (cgraph_analyze_queue): Declare. (cgraph_add_new_function): Declare. (cgraph_lower_function): Remove. * tree.c (walk_tree): Walk OMP_CLAUSE_CHAIN of OMP_CLAUSE_* nodes. Use switch for all nodes, handle most of IS_EXPR_CODE_CLASS and TYPE_P nodes in its default clause. (empty_body_p): New. (tree_range_check_failed): New. (build5_stat): New. * tree.h (OMP_CLAUSE_REDUCTION_INIT, OMP_CLAUSE_REDUCTION_MERGE, OMP_CLAUSE_REDUCTION_PLACEHOLDER, OMP_CLAUSE_PRIVATE_DEBUG, OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE, OMP_FOR_PRE_BODY, OMP_MASTER_BODY, OMP_ORDERED_BODY OMP_BODY, OMP_CLAUSES, OMP_CLAUSE_DECL, OMP_CLAUSE_DEFAULT_KIND, OMP_CLAUSE_CHAIN, OMP_CLAUSE_OUTER_DECL, OMP_CLAUSE_INNER_DECL, OMP_CLAUSE_NUM_THREADS_EXPR, OMP_CLAUSE_IF_EXPR, OMP_CLAUSE_SCHEDULE_CHUNK_EXPR, OMP_CLAUSE_SCHEDULE_CHUNK_SIZE. OMP_PARALLEL_VAR_INIT, OMP_PARALLEL_VAR_REDUC, OMP_FOR_VAR_INIT, OMP_FOR_VAR_LAST, OMP_FOR_VAR_REDUC, OMP_SECTIONS_VAR_INIT, OMP_SECTIONS_VAR_LAST, OMP_SECTIONS_VAR_REDUC, OMP_CLAUSE_REDUCTION_CODE OMP_SINGLE_CLAUSES, OMP_SINGLE_BODY, OMP_CLAUSE_SCHEDULE_CHUNK_SIZE, OMP_SECTION_BODY, OMP_CRITICAL_NAME, OMP_CRITICAL_BODY): New. (TREE_RANGE_CHECK): New. (empty_body_p): Declare. (enum omp_clause_default_kind): New. (build_string_literal): Declare. (enum omp_clause_schedule_kind, OMP_CLAUSE_SCHEDULE_KIND): New. (build5_stat, build5): Declare. * tree-pass.h (TDF_CHAIN): Define. * tree-pass.h (PROP_gimple_lomp): Define. (pass_lower_omp): Declare. * diagnostic.h (debug_tree_chain): Declare. * builtins.c (get_builtin_sync_mode): Use 0 as last argument to mode_for_size. (expand_builtin): Handle sync BUILT_IN_*_16 builtins. * builtins.c (build_string_literal): Make extern. * gcc.c (include_spec_function): New. (static_spec_functions): Add it. (main): Move load of libgomp.spec ... (LINK_COMMAND_SPEC): ... here. (link_gomp_spec): New. (static_specs): Include it. (LINK_COMMAND_SPEC): Add link_gomp. (GOMP_SELF_SPECS): New. (driver_self_specs): Include it. (switch_matches): Don't mark inline. (main): Load libgomp.spec. * tree-gimple.c (is_gimple_stmt): True for OMP_MASTER, OMP_ORDERED, OMP_CRITICAL, OMP_SECTIONS, OMP_SECTION, and OMP_SINGLE, OMP_FOR and OMP_PARALLEL. * tree-gimple.h (enum omp_parallel): Declare. (determine_parallel_type): Declare. (omp_firstprivatize_variable): Declare. (omp_reduction_init): Declare. (diagnose_omp_structured_block_errors): Declare. (struct walk_stmt_info): Add want_return_expr. (struct walk_stmt_info): Add want_bind_expr, want_locations. (find_omp_clause): Declare. (insert_field_into_struct): Declare. (struct walk_stmt_info): Move from tree-nested.c (walk_stmts): Declare. * c-cppbuiltin.c (c_cpp_builtins): If -fopenmp, #define _OPENMP to 200505. * cgraphunit.c (cgraph_lower_function): Make static. (cgraph_finalize_pending_functions): New. (cgraph_finalize_function): Call it. (cgraph_finalize_compilation_unit): Likewise. * builtin-types.def (BT_I16, BT_FN_I16_VPTR_I16, BT_FN_BOOL_VPTR_I16_I16, BT_FN_I16_VPTR_I16_I16): Add. (BT_FN_UINT_UINT): New. (DEF_FUNCTION_TYPE_6, DEF_FUNCTION_TYPE_7, DEF_FUNCTION_TYPE_VAR_4): Document. (BT_PTR_LONG, BT_PTR_PTR, BT_FN_BOOL, BT_FN_INT, BT_FN_VOID_PTRPTR, BT_PTR_FN_VOID_PTR, BT_FN_BOOL_LONGPTR_LONGPTR, BT_FN_VOID_OMPFN_PTR_UINT, BT_FN_VOID_OMPFN_PTR_UINT_UINT, BT_FN_BOOL_LONG_LONG_LONG_LONGPTR_LONGPTR, BT_FN_BOOL_LONG_LONG_LONG_LONG_LONGPTR_LONGPTR, BT_FN_VOID_OMPFN_PTR_UINT_LONG_LONG_LONG, BT_FN_VOID_OMPFN_PTR_UINT_LONG_LONG_LONG_LONG): New. * builtins.def: Update DEF_BUILTIN comment to include COND argument. Move all DEF_SYNC_BUILTIN () and DEF_GOMP_BUILTIN () builtins into separate files. (DEF_GOMP_BUILTIN): New. (BUILT_IN_OMP_GET_THREAD_NUM, BUILT_IN_GOMP_BARRIER, BUILT_IN_GOMP_CRITICAL_START, BUILT_IN_GOMP_CRITICAL_END, BUILT_IN_GOMP_CRITICAL_NAME_START, BUILT_IN_GOMP_CRITICAL_NAME_END, BUILT_IN_GOMP_LOOP_STATIC_START, BUILT_IN_GOMP_LOOP_DYNAMIC_START, BUILT_IN_GOMP_LOOP_GUIDED_START, BUILT_IN_GOMP_LOOP_RUNTIME_START, BUILT_IN_GOMP_LOOP_ORDERED_STATIC_START, BUILT_IN_GOMP_LOOP_ORDERED_DYNAMIC_START, BUILT_IN_GOMP_LOOP_ORDERED_GUIDED_START, BUILT_IN_GOMP_LOOP_ORDERED_RUNTIME_START, BUILT_IN_GOMP_LOOP_STATIC_NEXT, BUILT_IN_GOMP_LOOP_DYNAMIC_NEXT, BUILT_IN_GOMP_LOOP_GUIDED_NEXT, BUILT_IN_GOMP_LOOP_RUNTIME_NEXT, BUILT_IN_GOMP_LOOP_ORDERED_STATIC_NEXT, BUILT_IN_GOMP_LOOP_ORDERED_DYNAMIC_NEXT, BUILT_IN_GOMP_LOOP_ORDERED_GUIDED_NEXT, BUILT_IN_GOMP_LOOP_ORDERED_RUNTIME_NEXT, BUILT_IN_GOMP_PARALLEL_LOOP_STATIC_START, BUILT_IN_GOMP_PARALLEL_LOOP_DYNAMIC_START, BUILT_IN_GOMP_PARALLEL_LOOP_GUIDED_START, BUILT_IN_GOMP_PARALLEL_LOOP_RUNTIME_START, BUILT_IN_GOMP_LOOP_END, BUILT_IN_GOMP_LOOP_END_NOWAIT, BUILT_IN_GOMP_ORDERED_START, BUILT_IN_GOMP_ORDERED_END, BUILT_IN_GOMP_PARALLEL_START, BUILT_IN_GOMP_PARALLEL_END, BUILT_IN_GOMP_SECTIONS_START, BUILT_IN_GOMP_SECTIONS_NEXT, BUILT_IN_GOMP_PARALLEL_SECTIONS_START, BUILT_IN_GOMP_SECTIONS_END, BUILT_IN_GOMP_SECTIONS_END_NOWAIT, BUILT_IN_GOMP_SINGLE_START, BUILT_IN_GOMP_SINGLE_COPY_START, BUILT_IN_GOMP_SINGLE_COPY_END): New. * sync-builtins.def: New file, moved from builtins.def. * omp-builtins.def: New file, moved from builtins.def. * c-objc-common.h (LANG_HOOKS_OMP_PREDETERMINED_SHARING): Redefine. * gimple-low.c (lower_function_body): Clear data. (lower_stmt): Do not handle COMPOUND_EXPR. Remove call to print_node_brief. * c-tree.h (c_finish_omp_clauses): New prototype. (C_DECL_THREADPRIVATE_P): Define. (lookup_name_no_remap, c_omp_remap_private): Remove (c_begin_omp_parallel, c_finish_omp_parallel): Update. (check_for_loop_decls): Update decl. (lookup_name_no_remap, c_omp_remap_private): Declare. (build_indirect_ref, build_modify_expr, pushdecl, pushdecl_top_level): Move to c-common.h. * dwarf2out.c (loc_descriptor_from_tree_1): Don't set unsignedp before the switch, but just in the 2 places that need it. * c-decl.c (diagnose_mismatched_decls): Do not check for mismatched thread-local attributes when OLDDECL is marked threadprivate and NEWDECL has no thread-local attributes. (merge_decls): Merge C_DECL_THREADPRIVATE_P. (c_gimple_diagnostics_recursively): Rename from c_warn_unused_result_recursively. Invoke diagnose_omp_structured_block_errors. (check_for_loop_decls): Return a singular decl found. * langhooks.c (lhd_omp_predetermined_sharing): Return OMP_CLAUSE_DEFAULT_SHARED for DECL_ARTIFICIAL decls. (lhd_omp_firstprivatize_type_sizes): New. (lhd_omp_assignment): New. (lhd_omp_predetermined_sharing): New. * langhooks.h (struct gimplify_omp_ctx): Forward declare. (struct lang_hooks_for_types): Add omp_firstprivatize_type_sizes, omp_privatize_by_reference, omp_predetermined_sharing, omp_disregard_value_expr, omp_private_debug_clause, omp_clause_default_ctor, omp_clause_copy_ctor, omp_clause_assign_op, omp_clause_dtor. (c_finish_omp_clauses): New. (c_finish_bc_stmt): Diagnose break within omp for. (c_begin_omp_parallel, c_finish_omp_parallel): New. (build_unary_op): Return error_mark after reporting a readonly_error. (build_modify_expr): Likewise. * gimplify.c: Include optabs.h and pointer-set.h. (enum gimplify_omp_var_data): Declare. (struct gimplify_omp_ctx): Declare. (struct gimplify_ctx): Add fields prev_context, combined_pre_p and combined_ctxp. (gimplify_ctxp, gimplify_omp_ctxp): New local variables. (push_gimplify_context, pop_gimplify_context): Allow nesting. (splay_tree_compare_decl_uid): New. (new_omp_context): New. (delete_omp_context): New. (gimple_add_tmp_var): Call omp_add_variable. (gimplify_bind_expr): Likewise. (gimplify_var_or_parm_decl): If omp_notice_variable returned true, disregard DECL_VALUE_EXPR on the decl if any. (gimplify_expr_in_ctx): New. (omp_firstprivatize_variable, omp_firstprivatize_type_sizes omp_add_variable, omp_notice_variable, omp_is_private gimplify_scan_omp_clauses, gimplify_adjust_omp_clauses_1 gimplify_adjust_omp_clauses, gimplify_omp_parallel gimplify_omp_for, gimplify_omp_workshare, goa_lhs_expr_p gimplify_omp_atomic_fetch_op, goa_stabilize_expr gimplify_omp_atomic_pipeline, gimplify_omp_atomic_mutex gimplify_omp_atomic): New. (gimplify_expr): Handle OMP_PARALLEL, OMP_FOR, OMP_SECTIONS, OMP_SINGLE, OMP_SECTION, OMP_MASTER, OMP_ORDERED, OMP_CRITICAL and OMP_ATOMIC. (gimplify_body): Verify gimplify_ctxp is empty after gimplification. * c-pragma.h (enum pragma_kind): Add PRAGMA_OMP_ATOMIC, PRAGMA_OMP_BARRIER, PRAGMA_OMP_CRITICAL, PRAGMA_OMP_FLUSH, PRAGMA_OMP_FOR, PRAGMA_OMP_MASTER, PRAGMA_OMP_ORDERED, PRAGMA_OMP_PARALLEL, PRAGMA_OMP_PARALLEL_FOR, PRAGMA_OMP_PARALLEL_SECTIONS, PRAGMA_OMP_SECTION, PRAGMA_OMP_SECTIONS, PRAGMA_OMP_SINGLE, PRAGMA_OMP_THREADPRIVATE. * tree.def (OMP_PARALLEL, OMP_FOR, OMP_SECTIONS, OMP_SINGLE, OMP_SECTION, OMP_MASTER, OMP_ORDERED, OMP_CRITICAL, OMP_ATOMIC, OMP_CLAUSE_PRIVATE, OMP_CLAUSE_SHARED, OMP_CLAUSE_FIRSTPRIVATE, OMP_CLAUSE_LASTPRIVATE, OMP_CLAUSE_REDUCTION, OMP_CLAUSE_COPYIN, OMP_CLAUSE_COPYPRIVATE, OMP_CLAUSE_IF, OMP_CLAUSE_NUM_THREADS, OMP_CLAUSE_SCHEDULE, OMP_CLAUSE_NOWAIT, OMP_CLAUSE_ORDERED, OMP_CLAUSE_DEFAULT): Define. * print-tree.c (print_node): Dump DECL_VALUE_EXPR. * tree-ssa-dce.c (find_control_dependence): Do not assume that ENTRY_BLOCK_PTR->next_bb == single_succ (ENTRY_BLOCK_PTR). * tree-nested.c (convert_call_expr): Call walk_body on OMP_BODY for OpenMP directives. (struct nesting_info): Add field_map, suppress_expansion, debug_var_chain. (create_nesting_tree): Initialize them. (lookup_field_for_decl): Use field_map. (get_nonlocal_debug_decl, get_local_debug_decl): New. (convert_local_omp_clauses): New. (finalize_nesting_tree_1): Add debug_var_chain to toplevel block. (walk_body): Split out of walk_function. (convert_nonlocal_omp_clauses, convert_local_omp_clauses): New. (convert_nonlocal_reference): Handle omp statements. (convert_local_reference): Likewise. (unnest_nesting_tree_1): Split out of finalize_nesting_tree_1. (unnest_nesting_tree): New. (lower_nested_functions): Call it. (insert_field_into_struct): Make extern. (struct walk_stmt_info): Move to tree-gimple.h. (walk_stmts): Make extern. * omp-builtins.def: New file. * tree-iterator.c (expr_only): Clarify comment. * c-common.h (pushdecl_top_level, pushdecl, build_modify_expr, build_indirect_ref, c_finish_omp_master, c_finish_omp_critical, c_finish_omp_ordered, c_finish_omp_barrier, c_finish_omp_atomic, c_finish_omp_flush, c_finish_omp_for, c_split_parallel_clauses, omp_clause_default_kind, c_omp_sharing_predetermined, c_omp_remap_decl): Declare. * Makefile.in (BUILTINS_DEF): Add omp-builtins.def. (OBJS-common): Add omp-low.o. (c-omp.o, omp-low.o): Add. (gimplify.o): Add dependency on $(OPTABS_H). (GTFILES): Add omp-low.c. (gt-stringpool.h): Add. * tree-cfg.c (set_bb_for_stmt): Do not update the block-to-labels map if we are currently expanding to RTL. (tree_node_can_be_shared): Remove unnecessary CONSTANT_CLASS_P checks. Handle IDENTIFIER_NODE. (tree_verify_flow_info): Do not ICE when emitting error messages about invalid labels. (dump_function_to_file): Reset CFUN before emitting the body of the function. (debug_function): New. * passes.c (init_optimization_passes): Schedule pass_lower_omp. * langhooks-def.h (lhd_omp_predetermined_sharing, lhd_omp_assignment, lhd_omp_firstprivatize_type_sizes): Declare. (LANG_HOOKS_OMP_FIRSTPRIVATIZE_TYPE_SIZES): Define. (LANG_HOOKS_FOR_TYPES_INITIALIZER): Use it. (LANG_HOOKS_OMP_PRIVATIZE_BY_REFERENCE, LANG_HOOKS_OMP_PREDETERMINED_SHARING, LANG_HOOKS_OMP_DISREGARD_VALUE_EXPR, LANG_HOOKS_OMP_PRIVATE_DEBUG_CLAUSE, LANG_HOOKS_OMP_CLAUSE_DEFAULT_CTOR, LANG_HOOKS_OMP_CLAUSE_COPY_CTOR, LANG_HOOKS_OMP_CLAUSE_ASSIGN_OP, LANG_HOOKS_OMP_CLAUSE_DTOR): Define. (LANG_HOOK_DECLS): Use them. 2006-01-18 Dmitry Kurochkin <dmitry.kurochkin@gmail.com> Richard Henderson <rth@redhat.com> Jakub Jelinek <jakub@redhat.com> Diego Novillo <dnovillo@redhat.com> * c-parser.c (pragma_omp_clause): Define. (c_parser_declaration_or_fndef): Document OpenMP syntax. (c_parser_compound_statement): Likewise. (c_parser_statement): Likewise. (c_parser_pragma): Handle omp pragmas. (OMP_FOR_CLAUSE_MASK, OMP_SECTIONS_CLAUSE_MASK, OMP_PARALLEL_CLAUSE_MASK, OMP_SINGLE_CLAUSE_MASK): Define. (c_parser_omp_clause_name, check_no_duplicate_clause, c_parser_omp_variable_list, c_parser_omp_var_list_parens, c_parser_omp_clause_copyin, c_parser_omp_clause_copyprivate, c_parser_omp_clause_default, c_parser_omp_clause_firstprivate, c_parser_omp_clause_if, c_parser_omp_clause_lastprivate, c_parser_omp_clause_nowait, c_parser_omp_clause_num_threads, c_parser_omp_clause_ordered, c_parser_omp_clause_private, c_parser_omp_clause_reduction, c_parser_omp_clause_schedule, c_parser_omp_clause_shared, c_parser_omp_all_clauses, c_parser_omp_structured_block, c_parser_omp_atomic, c_parser_omp_barrier, c_parser_omp_critical, c_parser_omp_flush, c_parser_omp_for_loop, c_parser_omp_for, c_parser_omp_master, c_parser_omp_ordered, c_parser_omp_sections_scope, c_parser_omp_sections, c_parser_omp_parallel, c_parser_omp_single, c_parser_omp_construct, c_parser_omp_threadprivate): New. * c-pragma.c (init_pragma): Do omp pragma registration here. * c.opt (fopenmp): New flag. 2006-01-18 Eric Christopher <echristo@apple.com> * gcc.c (GOMP_SELF_SPECS): Bracket in #ifndef/#endif. * config/darwin.h (GOMP_SELF_SPECS): Define. testsuite/ 2006-01-18 Richard Henderson <rth@redhat.com> Aldy Hernandez <aldyh@redhat.com> Jakub Jelinek <jakub@redhat.com> Diego Novillo <dnovillo@redhat.com> Uros Bizjak <uros@kss-loka.si> * testsuite/gcc.dg/gomp: New directory. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@109902 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'libgomp/team.c')
-rw-r--r--libgomp/team.c344
1 files changed, 344 insertions, 0 deletions
diff --git a/libgomp/team.c b/libgomp/team.c
new file mode 100644
index 00000000000..1d8efb688af
--- /dev/null
+++ b/libgomp/team.c
@@ -0,0 +1,344 @@
+/* Copyright (C) 2005 Free Software Foundation, Inc.
+ Contributed by Richard Henderson <rth@redhat.com>.
+
+ This file is part of the GNU OpenMP Library (libgomp).
+
+ Libgomp is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
+ more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with libgomp; see the file COPYING.LIB. If not, write to the
+ Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ MA 02110-1301, USA. */
+
+/* As a special exception, if you link this library with other files, some
+ of which are compiled with GCC, to produce an executable, this library
+ does not by itself cause the resulting executable to be covered by the
+ GNU General Public License. This exception does not however invalidate
+ any other reasons why the executable file might be covered by the GNU
+ General Public License. */
+
+/* This file handles the maintainence of threads in response to team
+ creation and termination. */
+
+#include "libgomp.h"
+#include <stdlib.h>
+#include <string.h>
+
+
+/* This array manages threads spawned from the top level, which will
+ return to the idle loop once the current PARALLEL construct ends. */
+static struct gomp_thread **gomp_threads;
+static unsigned gomp_threads_size;
+static unsigned gomp_threads_used;
+
+/* This attribute contains PTHREAD_CREATE_DETACHED. */
+static pthread_attr_t gomp_thread_attr;
+
+/* This barrier holds and releases threads waiting in gomp_threads. */
+static gomp_barrier_t gomp_threads_dock;
+
+/* This is the libgomp per-thread data structure. */
+#ifdef HAVE_TLS
+__thread struct gomp_thread gomp_tls_data;
+#else
+pthread_key_t gomp_tls_key;
+#endif
+
+
+/* This structure is used to communicate across pthread_create. */
+
+struct gomp_thread_start_data
+{
+ struct gomp_team_state ts;
+ void (*fn) (void *);
+ void *fn_data;
+ bool nested;
+};
+
+
+/* This function is a pthread_create entry point. This contains the idle
+ loop in which a thread waits to be called up to become part of a team. */
+
+static void *
+gomp_thread_start (void *xdata)
+{
+ struct gomp_thread_start_data *data = xdata;
+ struct gomp_thread *thr;
+ void (*local_fn) (void *);
+ void *local_data;
+
+#ifdef HAVE_TLS
+ thr = &gomp_tls_data;
+#else
+ struct gomp_thread local_thr;
+ thr = &local_thr;
+ pthread_setspecific (gomp_tls_key, thr);
+#endif
+ gomp_sem_init (&thr->release, 0);
+
+ /* Extract what we need from data. */
+ local_fn = data->fn;
+ local_data = data->fn_data;
+ thr->ts = data->ts;
+
+ thr->ts.team->ordered_release[thr->ts.team_id] = &thr->release;
+
+ if (data->nested)
+ {
+ gomp_barrier_wait (&thr->ts.team->barrier);
+ local_fn (local_data);
+ gomp_barrier_wait (&thr->ts.team->barrier);
+ }
+ else
+ {
+ gomp_threads[thr->ts.team_id] = thr;
+
+ gomp_barrier_wait (&gomp_threads_dock);
+ do
+ {
+ struct gomp_team *team;
+
+ local_fn (local_data);
+
+ /* Clear out the team and function data. This is a debugging
+ signal that we're in fact back in the dock. */
+ team = thr->ts.team;
+ thr->fn = NULL;
+ thr->data = NULL;
+ thr->ts.team = NULL;
+ thr->ts.work_share = NULL;
+ thr->ts.team_id = 0;
+ thr->ts.work_share_generation = 0;
+ thr->ts.static_trip = 0;
+
+ gomp_barrier_wait (&team->barrier);
+ gomp_barrier_wait (&gomp_threads_dock);
+
+ local_fn = thr->fn;
+ local_data = thr->data;
+ }
+ while (local_fn);
+ }
+
+ return NULL;
+}
+
+
+/* Create a new team data structure. */
+
+static struct gomp_team *
+new_team (unsigned nthreads, struct gomp_work_share *work_share)
+{
+ struct gomp_team *team;
+ size_t size;
+
+ size = sizeof (*team) + nthreads * sizeof (team->ordered_release[0]);
+ team = gomp_malloc (size);
+ gomp_mutex_init (&team->work_share_lock);
+
+ team->work_shares = gomp_malloc (4 * sizeof (struct gomp_work_share *));
+ team->generation_mask = 3;
+ team->oldest_live_gen = work_share == NULL;
+ team->num_live_gen = work_share != NULL;
+ team->work_shares[0] = work_share;
+
+ team->nthreads = nthreads;
+ gomp_barrier_init (&team->barrier, nthreads);
+
+ gomp_sem_init (&team->master_release, 0);
+ team->ordered_release[0] = &team->master_release;
+
+ return team;
+}
+
+
+/* Free a team data structure. */
+
+static void
+free_team (struct gomp_team *team)
+{
+ free (team->work_shares);
+ gomp_mutex_destroy (&team->work_share_lock);
+ gomp_barrier_destroy (&team->barrier);
+ gomp_sem_destroy (&team->master_release);
+ free (team);
+}
+
+
+/* Launch a team. */
+
+void
+gomp_team_start (void (*fn) (void *), void *data, unsigned nthreads,
+ struct gomp_work_share *work_share)
+{
+ struct gomp_thread_start_data *start_data;
+ struct gomp_thread *thr, *nthr;
+ struct gomp_team *team;
+ bool nested;
+ unsigned i, n, old_threads_used = 0;
+
+ thr = gomp_thread ();
+ nested = thr->ts.team != NULL;
+
+ team = new_team (nthreads, work_share);
+
+ /* Always save the previous state, even if this isn't a nested team.
+ In particular, we should save any work share state from an outer
+ orphaned work share construct. */
+ team->prev_ts = thr->ts;
+
+ thr->ts.team = team;
+ thr->ts.work_share = work_share;
+ thr->ts.team_id = 0;
+ thr->ts.work_share_generation = 0;
+ thr->ts.static_trip = 0;
+
+ if (nthreads == 1)
+ return;
+
+ i = 1;
+
+ /* We only allow the reuse of idle threads for non-nested PARALLEL
+ regions. This appears to be implied by the semantics of
+ threadprivate variables, but perhaps that's reading too much into
+ things. Certainly it does prevent any locking problems, since
+ only the initial program thread will modify gomp_threads. */
+ if (!nested)
+ {
+ old_threads_used = gomp_threads_used;
+
+ if (nthreads <= old_threads_used)
+ n = nthreads;
+ else if (old_threads_used == 0)
+ {
+ n = 0;
+ gomp_barrier_init (&gomp_threads_dock, nthreads);
+ }
+ else
+ {
+ n = old_threads_used;
+
+ /* Increase the barrier threshold to make sure all new
+ threads arrive before the team is released. */
+ gomp_barrier_reinit (&gomp_threads_dock, nthreads);
+ }
+
+ /* Not true yet, but soon will be. We're going to release all
+ threads from the dock, and those that aren't part of the
+ team will exit. */
+ gomp_threads_used = nthreads;
+
+ /* Release existing idle threads. */
+ for (; i < n; ++i)
+ {
+ nthr = gomp_threads[i];
+ nthr->ts.team = team;
+ nthr->ts.work_share = work_share;
+ nthr->ts.team_id = i;
+ nthr->ts.work_share_generation = 0;
+ nthr->ts.static_trip = 0;
+ nthr->fn = fn;
+ nthr->data = data;
+ team->ordered_release[i] = &nthr->release;
+ }
+
+ if (i == nthreads)
+ goto do_release;
+
+ /* If necessary, expand the size of the gomp_threads array. It is
+ expected that changes in the number of threads is rare, thus we
+ make no effort to expand gomp_threads_size geometrically. */
+ if (nthreads >= gomp_threads_size)
+ {
+ gomp_threads_size = nthreads + 1;
+ gomp_threads
+ = gomp_realloc (gomp_threads,
+ gomp_threads_size
+ * sizeof (struct gomp_thread_data *));
+ }
+ }
+
+ start_data = alloca (sizeof (struct gomp_thread_start_data) * (nthreads-i));
+
+ /* Launch new threads. */
+ for (; i < nthreads; ++i, ++start_data)
+ {
+ pthread_t pt;
+ int err;
+
+ start_data->ts.team = team;
+ start_data->ts.work_share = work_share;
+ start_data->ts.team_id = i;
+ start_data->ts.work_share_generation = 0;
+ start_data->ts.static_trip = 0;
+ start_data->fn = fn;
+ start_data->fn_data = data;
+ start_data->nested = nested;
+
+ err = pthread_create (&pt, &gomp_thread_attr,
+ gomp_thread_start, start_data);
+ if (err != 0)
+ gomp_fatal ("Thread creation failed: %s", strerror (err));
+ }
+
+ do_release:
+ gomp_barrier_wait (nested ? &team->barrier : &gomp_threads_dock);
+
+ /* Decrease the barrier threshold to match the number of threads
+ that should arrive back at the end of this team. The extra
+ threads should be exiting. Note that we arrange for this test
+ to never be true for nested teams. */
+ if (nthreads < old_threads_used)
+ gomp_barrier_reinit (&gomp_threads_dock, nthreads);
+}
+
+
+/* Terminate the current team. This is only to be called by the master
+ thread. We assume that we must wait for the other threads. */
+
+void
+gomp_team_end (void)
+{
+ struct gomp_thread *thr = gomp_thread ();
+ struct gomp_team *team = thr->ts.team;
+
+ gomp_barrier_wait (&team->barrier);
+
+ thr->ts = team->prev_ts;
+
+ free_team (team);
+}
+
+
+/* Constructors for this file. */
+
+static void __attribute__((constructor))
+initialize_team (void)
+{
+ struct gomp_thread *thr;
+
+#ifndef HAVE_TLS
+ static struct gomp_thread initial_thread_tls_data;
+
+ pthread_key_create (&gomp_tls_key, NULL);
+ pthread_setspecific (gomp_tls_key, &initial_thread_tls_data);
+#endif
+
+#ifdef HAVE_TLS
+ thr = &gomp_tls_data;
+#else
+ thr = &initial_thread_tls_data;
+#endif
+ gomp_sem_init (&thr->release, 0);
+
+ pthread_attr_init (&gomp_thread_attr);
+ pthread_attr_setdetachstate (&gomp_thread_attr, PTHREAD_CREATE_DETACHED);
+}