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#ifndef SCHEDULER_INCLUDED #define SCHEDULER_INCLUDED /* Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved. Copyright (c) 2012, Monty Program Ab This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */ /* Classes for the thread scheduler */ #ifdef USE_PRAGMA_INTERFACE #pragma interface #endif class THD; /* Functions used when manipulating threads */ struct scheduler_functions { uint max_threads; Atomic_counter<uint> *connection_count; ulong *max_connections; bool (*init)(void); void (*add_connection)(CONNECT *connect); void (*thd_wait_begin)(THD *thd, int wait_type); void (*thd_wait_end)(THD *thd); void (*post_kill_notification)(THD *thd); void (*end)(void); /** resume previous unfinished command (threadpool only)*/ void (*thd_resume)(THD* thd); }; /** Scheduler types enumeration. The default of --thread-handling is the first one in the thread_handling_names array, this array has to be consistent with the order in this array, so to change default one has to change the first entry in this enum and the first entry in the thread_handling_names array. @note The last entry of the enumeration is also used to mark the thread handling as dynamic. In this case the name of the thread handling is fetched from the name of the plugin that implements it. */ enum scheduler_types { /* The default of --thread-handling is the first one in the thread_handling_names array, this array has to be consistent with the order in this array, so to change default one has to change the first entry in this enum and the first entry in the thread_handling_names array. */ SCHEDULER_ONE_THREAD_PER_CONNECTION=0, SCHEDULER_NO_THREADS, SCHEDULER_TYPES_COUNT }; void one_thread_per_connection_scheduler(scheduler_functions *func, ulong *arg_max_connections, Atomic_counter<uint> *arg_connection_count); void one_thread_scheduler(scheduler_functions *func, Atomic_counter<uint> *arg_connection_count); extern void scheduler_init(); extern void post_kill_notification(THD *); /* To be used for pool-of-threads (implemeneted differently on various OSs) */ struct thd_scheduler { public: void *data; /* scheduler-specific data structure */ }; #ifdef HAVE_POOL_OF_THREADS void pool_of_threads_scheduler(scheduler_functions* func, ulong *arg_max_connections, Atomic_counter<uint> *arg_connection_count); #else #define pool_of_threads_scheduler(A,B,C) \ one_thread_per_connection_scheduler(A, B, C) #endif /*HAVE_POOL_OF_THREADS*/ #endif /* SCHEDULER_INCLUDED */
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