/* BEGIN_ICS_COPYRIGHT5 **************************************** Copyright (c) 2015, Intel Corporation Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name of Intel Corporation nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ** END_ICS_COPYRIGHT5 ****************************************/ #include #include #include #include "datatypes.h" #include "ithread.h" #include "idebug.h" //---------------------------------------------------------------- //Globals //---------------------------------------------------------------- // threadNameKey is global to all threads which is used to access // the thread's name from its thread local storage. static pthread_key_t threadNameKey; static pthread_once_t key_once = PTHREAD_ONCE_INIT; // ensures key is only set once static int isNameKeySet = 0; // to ensure key has been created before it is used. //---------------------------------------------------------------- //Init function to set the threadNameKey once. //Invoked via the pthread_once interface in __UserThreadStartup. //---------------------------------------------------------------- static void __ThreadMakeKey() { int rc; if ((rc = pthread_key_create(&threadNameKey, NULL)) == 0) isNameKeySet = 1; else MsgOut("Failed to create thread name key, rc: %d.\n",rc); } //---------------------------------------------------------------- // Internal function to initialize the thread data structure. This // function is typically called before a call to kernel_thread(). //---------------------------------------------------------------- static void __InitializeThreadData(IN THREAD *pThread, IN THREAD_CALLBACK Callback, IN void *Context, IN char *Name) { pThread->m_Private.m_Osd.tr_flags = 0; pThread->m_Private.m_Callback = Callback; pThread->m_Private.m_Context = Context; memcpy(pThread->m_Private.m_Osd.tr_name, Name, THREAD_NAME_SIZE); EventInit( &pThread->m_Private.m_Osd.tr_RunningEvent ); } // //---------------------------------------------------------------- // Internal function to run a new user mode thread. // This function is always run as a result of creation a new user mode thread. // Its main job is to synchronize the creation and running of the new thread. //---------------------------------------------------------------- // static int __UserThreadStartup(void * arg) { THREAD *pThread = (THREAD *) arg; // // Trigger the thread running event. // The creating thread waits on this event. // #if DEBUG_THREAD DbgOut ("__UserThreadStartup( %p )[\n",pThread ); #endif // create thread name_key (void)pthread_once(&key_once, __ThreadMakeKey); // set thread name if (isNameKeySet) ThreadSetName(pThread->m_Private.m_Osd.tr_name); EventTrigger(&pThread->m_Private.m_Osd.tr_RunningEvent); if (pThread->m_Private.m_Callback) { pThread->m_Private.m_Callback(pThread->m_Private.m_Context); } #if DEBUG_THREAD DbgOut("__UserThreadStartup( %p )]\n",pThread ); #endif return (0) ; } //---------------------------------------------------------------- // // Indicate that there was an intent to use a thread //---------------------------------------------------------------- // void ThreadInitState ( IN THREAD *pThread ) { pThread->m_Private.m_Osd.tr_state = Constructed; EventInitState( &pThread->m_Private.m_Osd.tr_RunningEvent); } // //---------------------------------------------------------------- // Create a new thread. This thread will execute supplied "Callback" // with the user supplied "Context" //---------------------------------------------------------------- // boolean ThreadCreate( IN THREAD *pThread, IN char* Name, IN THREAD_CALLBACK Callback, IN void *Context ) { int ret; if (pThread == NULL) { return FALSE; } // // Initialize the thread structure // __InitializeThreadData(pThread, Callback, Context, Name); #if DEBUG_THREAD DbgOut("__ThreadCreate( %p )[\n",pThread ); #endif ret = pthread_create(&pThread->m_Private.m_Osd.tr_id, NULL, (void *)__UserThreadStartup, (void *)pThread); if (ret != 0) // pthread_create returns a "0" for success { return FALSE; } // TBD - any way to set name of thread? // // Wait for the "child" thread to indicate that it is up and running // It assumes that the spawned thread will signal Running Event when it starts up // EventWaitOn( &pThread->m_Private.m_Osd.tr_RunningEvent, EVENT_NO_TIMEOUT); pThread->m_Private.m_Osd.tr_state = Started; #if DEBUG_THREAD DbgOut("__ThreadCreate( %p )]\n",pThread ); #endif return TRUE; } // //---------------------------------------------------------------- // Destroy the thread. // If this function is called after the callback function terminated causing // the thread to terminate, this function returns immediately. // If this function is called before the callback function returns, the // caller will wait for the kill event forever. //---------------------------------------------------------------- // void ThreadDestroy( IN THREAD *pThread ) { if ( pThread->m_Private.m_Osd.tr_state != Started ) { // thread was never Started return; } // If more than one threads are wating on a thread // the outcome may not be deterministic // Might want to try waiting on the thread kill event #if DEBUG_THREAD DbgOut ("__ThreadDestroy( %p )[\n",pThread ); #endif pthread_join( pThread->m_Private.m_Osd.tr_id, NULL ); EventDestroy( &pThread->m_Private.m_Osd.tr_RunningEvent ); // clear all the thread state data pThread->m_Private.m_Osd.tr_state = Destroyed; pThread->m_Private.m_Osd.tr_id = 0; pThread->m_Private.m_Callback = NULL; pThread->m_Private.m_Context = NULL; #if DEBUG_THREAD DbgOut ("__ThreadDestroy( %p )]\n",pThread ); #endif } // //---------------------------------------------------------------- // Suspend a thread execution for "pause_ms" milliseconds //---------------------------------------------------------------- // void ThreadSuspend( IN uint32 pause_ms ) { // Convert to micro seconds usleep(pause_ms * 1000); } // //---------------------------------------------------------------- // Delay execution of thread for some number of microseconds. // This uses Linuxs' udelay() function. Remember, suggested maximum // value of microseconds is 1000, ie, 1 milliseconds. //---------------------------------------------------------------- // void ThreadStall( IN uint32 pause_us ) { usleep(pause_us); } //---------------------------------------------------------------- // Number of processors on this system //---------------------------------------------------------------- uint32 ProcCount(void) { //******************************** //*********** FOR NOW!! ********** //******************************** return 0; } uint32 CurrentProc(void) { return 0; // for now } //---------------------------------------------------------------- // set priority for current thread //---------------------------------------------------------------- void ThreadSetPriority(IN THREAD_PRI pri) { if (nice(pri) < 0) { MsgOut("Failed to set thread priority.\n"); } } //---------------------------------------------------------------- //set thread name. using a thread specific key //---------------------------------------------------------------- void ThreadSetName(IN char *name) { if( pthread_setspecific(threadNameKey, name)!= 0) { MsgOut("Failed to Set Thread Name.\n"); } } //------------------------------------------------------------------ // get thread name. returns the name which was set by // ThreadSetName(). // ----------------------------------------------------------------- char* ThreadGetName(void) { char* name; name = (char*)pthread_getspecific(threadNameKey); return (name != NULL)?name:"null"; }