diff options
Diffstat (limited to 'src/ppe/pk/kernel/pk_thread_init.c')
| -rw-r--r-- | src/ppe/pk/kernel/pk_thread_init.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/src/ppe/pk/kernel/pk_thread_init.c b/src/ppe/pk/kernel/pk_thread_init.c new file mode 100644 index 0000000..b2c7735 --- /dev/null +++ b/src/ppe/pk/kernel/pk_thread_init.c @@ -0,0 +1,158 @@ +/* IBM_PROLOG_BEGIN_TAG */ +/* This is an automatically generated prolog. */ +/* */ +/* $Source: src/ppe/pk/kernel/pk_thread_init.c $ */ +/* */ +/* OpenPOWER OnChipController Project */ +/* */ +/* Contributors Listed Below - COPYRIGHT 2015 */ +/* [+] International Business Machines Corp. */ +/* */ +/* */ +/* Licensed under the Apache License, Version 2.0 (the "License"); */ +/* you may not use this file except in compliance with the License. */ +/* You may obtain a copy of the License at */ +/* */ +/* http://www.apache.org/licenses/LICENSE-2.0 */ +/* */ +/* Unless required by applicable law or agreed to in writing, software */ +/* distributed under the License is distributed on an "AS IS" BASIS, */ +/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */ +/* implied. See the License for the specific language governing */ +/* permissions and limitations under the License. */ +/* */ +/* IBM_PROLOG_END_TAG */ +//----------------------------------------------------------------------------- +// *! (C) Copyright International Business Machines Corp. 2014 +// *! All Rights Reserved -- Property of IBM +// *! *** IBM Confidential *** +//----------------------------------------------------------------------------- + +/// \file pk_thread_init.c +/// \brief PK thread API initialization routines +/// +/// The entry points in this file are routines that are typically used during +/// initialization, and their code space could be deallocated and recovered if +/// no longer needed by the application after initialization. + +#include "pk.h" + +/// Create (initialize) a thread +/// +/// \param thread A pointer to an PkThread structure to initialize +/// +/// \param thread_routine The subroutine that implements the thread +/// +/// \param arg Private data to be passed as the argument to the thread +/// routine when it begins execution +/// +/// \param stack The stack space of the thread +/// +/// \param stack_size The size of the stack in bytes +/// +/// \param priority The initial priority of the thread +/// +/// The \a thread argument must be a pointer to an uninitialized or completed +/// or deleted thread. This \c PkThread structure \em is the thread, so this +/// memory area must not be modified by the application until the thread +/// completes or is deleted. PK can not tell if an PkThread structure is +/// currently in use as a thread control block.pk_thread_create() will +/// silently overwrite an PkThread structure that is currently in use. +/// +/// The stack area must be large enough to hold the dynamic stack requirements +/// of the entry point routine, and all subroutines and functions that might +/// be invoked on any path from the entry point. The stack must also always +/// be able to hold the thread context in the event the thread is preempted, +/// plus other critical context. PK aligns stack areas in machine-specific +/// ways, so that the actual stack area may reduced in size slightly if it is +/// not already aligned. +/// +/// Threads are created runnable but unmapped. A newly created thread will +/// not be eligible to run until a call of pk_thread_resume() targets the +/// thread. +/// +/// Return values other than PK_OK (0) are errors; see \ref pk_errors +/// +/// \retval 0 Successful completion +/// +/// \retval -PK_INVALID_THREAD_AT_CREATE The \a thread is a null (0) pointer. +/// +/// \retval -PK_INVALID_ARGUMENT_THREAD1 the \a thread_routine is null (0) +/// +/// \retval -PK_INVALID_ARGUMENT_THREAD2 the \a priority is invalid, +/// +/// \retval -PK_INVALID_ARGUMENT_THREAD3 the stack area wraps around +/// the end of memory. +/// +/// \retval -PK_STACK_OVERFLOW The stack area at thread creation is smaller +/// than the minimum safe size. + +int +pk_thread_create(PkThread *thread, + PkThreadRoutine thread_routine, + void *arg, + PkAddress stack, + size_t stack_size, + PkThreadPriority priority) +{ + int rc; + + if (PK_ERROR_CHECK_API) { + PK_ERROR_IF(thread == 0, PK_INVALID_THREAD_AT_CREATE); + PK_ERROR_IF((thread_routine == 0) || + (priority >= PK_THREADS), + PK_INVALID_ARGUMENT_THREAD1); + } + + rc = __pk_stack_init(&stack, &stack_size); + if (rc) { + return rc; + } + + thread->saved_stack_pointer = stack; + thread->stack_base = stack; + + if (PK_STACK_DIRECTION < 0) { + + thread->stack_limit = stack - stack_size; + if (PK_ERROR_CHECK_API) { + PK_ERROR_IF(thread->stack_limit > thread->stack_base, + PK_INVALID_ARGUMENT_THREAD2); + } + + } else { + + thread->stack_limit = stack + stack_size; + if (PK_ERROR_CHECK_API) { + PK_ERROR_IF(thread->stack_limit < thread->stack_base, + PK_INVALID_ARGUMENT_THREAD3); + } + } + + thread->semaphore = 0; + thread->priority = priority; + thread->state = PK_THREAD_STATE_SUSPENDED_RUNNABLE; + thread->flags = 0; + + pk_timer_create(&(thread->timer), + __pk_thread_timeout, + (void *)thread); + + __pk_thread_context_initialize(thread, thread_routine, arg); + + return rc; +} + + + + + + + + + + + + + + |
