Subversion Repositories openrisc

#ifndef CYGONCE_KERNEL_THREAD_INL

#define CYGONCE_KERNEL_THREAD_INL

//==========================================================================

//

//      thread.inl

//

//      Thread class inlines

//

//==========================================================================

//####ECOSGPLCOPYRIGHTBEGIN####

// -------------------------------------------

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.

// Copyright (C) 2003 Gary Thomas

//

// eCos 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; either version 2 or (at your option) any later version.

//

// eCos 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 eCos; if not, write to the Free Software Foundation, Inc.,

// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

//

// As a special exception, if other files instantiate templates or use macros

// or inline functions from this file, or you compile this file and link it

// with other works to produce a work based on this file, this file does not

// by itself cause the resulting work to be covered by the GNU General Public

// License. However the source code for this file must still be made available

// in accordance with section (3) of the GNU General Public License.

//

// This exception does not invalidate any other reasons why a work based on

// this file might be covered by the GNU General Public License.

//

// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.

// at http://sources.redhat.com/ecos/ecos-license/

// -------------------------------------------

//####ECOSGPLCOPYRIGHTEND####

//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):   nickg

// Contributors:        nickg

// Date:        1997-09-09

// Purpose:     Define inlines for thread classes

// Description: Inline implementations of various member functions defined

//              in various Thread classes.

// Usage:

//              #include 

//              ...

//              #include 

//              ...

//

//####DESCRIPTIONEND####

//

//==========================================================================

#include 

#include 

#include 

#include 

#ifndef CYGNUM_KERNEL_THREADS_STACK_CHECK_DATA_SIZE

#define CYGNUM_KERNEL_THREADS_STACK_CHECK_DATA_SIZE (0)

#endif

//==========================================================================

// Inlines for Cyg_HardwareThread

// -------------------------------------------------------------------------

// get the size/base of this thread's stack

inline CYG_ADDRESS

Cyg_HardwareThread::get_stack_base()

{

    return stack_base - CYGNUM_KERNEL_THREADS_STACK_CHECK_DATA_SIZE;

}

inline cyg_uint32

Cyg_HardwareThread::get_stack_size()

{

    return stack_size + 2 * CYGNUM_KERNEL_THREADS_STACK_CHECK_DATA_SIZE;

}

// -------------------------------------------------------------------------

// Check the stack bounds of this thread:

#ifdef CYGFUN_KERNEL_THREADS_STACK_CHECKING

inline void Cyg_HardwareThread::check_stack(void)

{

    cyg_uint32 sig = (cyg_uint32)this;

    cyg_uint32 *base = (cyg_uint32 *)get_stack_base();

    cyg_uint32 *top =  (cyg_uint32 *)(stack_base + stack_size);

    cyg_ucount32 i;

    CYG_INSTRUMENT_THREAD(CHECK_STACK, base, top );

    CYG_ASSERT( 0 == ((sizeof(CYG_WORD)-1) & (cyg_uint32)base), "stack base not word aligned" );

    CYG_ASSERT( 0 == ((sizeof(CYG_WORD)-1) & (cyg_uint32)top),  "stack  top not word aligned" );

    CYG_ASSERT( (cyg_uint32)stack_ptr > (cyg_uint32)stack_base,

                "Stack_ptr below base" );

    CYG_ASSERT( (cyg_uint32)stack_ptr <= ((cyg_uint32)stack_base + stack_size),

                "Stack_ptr above top" );

    for ( i = 0;

          i < CYGNUM_KERNEL_THREADS_STACK_CHECK_DATA_SIZE/sizeof(cyg_uint32);

          i++ ) {

        if ((sig ^ (i * 0x01010101)) != base[i]) {

            char *reason = "Stack base corrupt";

            diag_printf("%s - i: %d\n", reason, i);

            diag_dump_buf(base, CYGNUM_KERNEL_THREADS_STACK_CHECK_DATA_SIZE);

            CYG_FAIL(reason);

        }

        if ((sig ^ (i * 0x10101010)) != top[i]) {

            char *reason = "Stack top corrupt";

            diag_printf("%s - i: %d\n", reason, i);

            diag_dump_buf(top, CYGNUM_KERNEL_THREADS_STACK_CHECK_DATA_SIZE);

            CYG_FAIL(reason);

        }

    }

#ifdef CYGFUN_KERNEL_THREADS_STACK_LIMIT

    // we won't have added check data above the stack limit if it hasn't

    // been incremented

    if (stack_limit != stack_base) {

        CYG_ADDRESS limit = stack_limit;

        // the limit will be off by the check data size, so lets correct it

        limit -= CYGNUM_KERNEL_THREADS_STACK_CHECK_DATA_SIZE;

        // determine base of check data by rounding up to nearest word aligned

        // address if not already aligned

        cyg_uint32 *p = (cyg_uint32 *)((limit + 3) & ~3);

        // i.e. + sizeof(cyg_uint32)-1) & ~(sizeof(cyg_uint32)-1);

        for ( i = 0;

              i < CYGNUM_KERNEL_THREADS_STACK_CHECK_DATA_SIZE/sizeof(cyg_uint32);

              i++ ) {

            if ((sig ^ (i * 0x01010101)) != p[i]) {

                char *reason = "Gap between stack limit and base corrupt";

                diag_printf("%s - i: %d\n", reason, i);

                diag_dump_buf(p, CYGNUM_KERNEL_THREADS_STACK_CHECK_DATA_SIZE);

                CYG_FAIL(reason);

            }

        }

    }

#endif

}

#endif

// -------------------------------------------------------------------------

// Measure the stack usage of the thread

#ifdef CYGFUN_KERNEL_THREADS_STACK_MEASUREMENT

inline cyg_uint32 Cyg_HardwareThread::measure_stack_usage(void)

{

#ifdef CYGFUN_KERNEL_THREADS_STACK_LIMIT

    CYG_WORD *base = (CYG_WORD *)stack_limit;

    cyg_uint32 size = (stack_size - (stack_limit-stack_base))/sizeof(CYG_WORD);

#else

    CYG_WORD *base = (CYG_WORD *)stack_base;

    cyg_uint32 size = stack_size/sizeof(CYG_WORD);

#endif

    cyg_ucount32 i;

    // Work up the stack comparing with the preset value

    // We assume the stack grows downwards, hmm...

    for (i=0; i

        if (base[i] != 0xDEADBEEF)

          break;

    }

    return (size - i)*sizeof(CYG_WORD);

}

#endif

// -------------------------------------------------------------------------

// Attach a stack to this thread. If there is a HAL defined macro to

// do this, then we use that, otherwise assume a falling stack.

inline void Cyg_HardwareThread::attach_stack(CYG_ADDRESS s_base, cyg_uint32 s_size)

{

#ifdef CYGNUM_HAL_STACK_SIZE_MINIMUM

    CYG_ASSERT( s_size >= CYGNUM_HAL_STACK_SIZE_MINIMUM,

                "Stack size too small");

#endif

#ifdef CYGFUN_KERNEL_THREADS_STACK_CHECKING

    {

        cyg_uint32 sig = (cyg_uint32)this;

        cyg_uint32 *base = (cyg_uint32 *)s_base;

        cyg_uint32 *top =  (cyg_uint32 *)(s_base + s_size -

            CYGNUM_KERNEL_THREADS_STACK_CHECK_DATA_SIZE);

        unsigned int i;

        CYG_INSTRUMENT_THREAD(ATTACH_STACK, base, top );

        CYG_ASSERT( NULL != base, "stack base non-NULL" );

        CYG_ASSERT( 0 == ((sizeof(CYG_WORD)-1) & (cyg_uint32)base), "stack base alignment" );

        CYG_ASSERT( 0 == ((sizeof(CYG_WORD)-1) & (cyg_uint32)top),  "stack  top alignment" );

        for ( i = 0;

              i < CYGNUM_KERNEL_THREADS_STACK_CHECK_DATA_SIZE/sizeof(cyg_uint32);

              i++ ) {

            base[i] = (sig ^ (i * 0x01010101));

             top[i] = (sig ^ (i * 0x10101010));

        }

        // This check for overlap of the two signature areas also detects

        // wrap round zero of the size in the unsigned subtraction below.

        CYG_ASSERT( &base[i] < &top[0], "Stack is so small size wrapped" );

        // Use this 'i' expression to round correctly to whole words.

        s_base += i * sizeof(cyg_uint32);

        s_size -= i * sizeof(cyg_uint32) * 2;

        // This is a complete guess, the 256; the point is to assert early that

        // this might go badly wrong.  It would not detect wrap of unsigned size.

        CYG_ASSERT( s_size >= 256,

                    "Stack size too small after allocating checking buffer");

    }

#endif

#ifdef CYGFUN_KERNEL_THREADS_STACK_MEASUREMENT

    {

        CYG_WORD *base = (CYG_WORD *)s_base;

        cyg_uint32 size = s_size/sizeof(CYG_WORD);

        cyg_ucount32 i;

        // initialize all of stack with known value - don't choose 0

        // could do with pseudo value as above, but this way, checking

        // is faster

        for (i=0; i

                base[i] = 0xDEADBEEF;

        }

        // Don't bother about the case when the stack isn't a multiple of

        // CYG_WORD in size. Since it's at the top of the stack, it will

        // almost certainly be overwritten the instant the thread starts

        // anyway.

    }

#endif

    stack_base = s_base;

    stack_size = s_size;

#ifdef CYGFUN_KERNEL_THREADS_STACK_LIMIT

    stack_limit = s_base;

#endif

#ifdef HAL_THREAD_ATTACH_STACK

    HAL_THREAD_ATTACH_STACK(stack_ptr, stack_base, stack_size);

#else

    stack_ptr = stack_base + stack_size;

#endif

#ifdef CYGFUN_KERNEL_THREADS_STACK_CHECKING

    check_stack();

#endif

}

// -------------------------------------------------------------------------

inline Cyg_HardwareThread::Cyg_HardwareThread(

    cyg_thread_entry        *e_point,   // entry point function

    CYG_ADDRWORD            e_data,     // entry data

    cyg_ucount32            s_size,     // stack size, 0 = use default

    CYG_ADDRESS             s_base      // stack base, NULL = allocate

)

{

    entry_point = e_point;

    entry_data  = e_data;

#ifdef CYGDBG_KERNEL_DEBUG_GDB_THREAD_SUPPORT

    saved_context = 0;

#endif

    attach_stack( s_base, s_size );

};

// -------------------------------------------------------------------------

#ifdef CYGDBG_KERNEL_DEBUG_GDB_THREAD_SUPPORT

// Return the current saved state for this thread.

inline HAL_SavedRegisters *Cyg_HardwareThread::get_saved_context()

{

    HAL_SavedRegisters *regs;

    if( saved_context != 0 ) regs = saved_context;

    else HAL_THREAD_GET_SAVED_REGISTERS( stack_ptr, regs );

    return regs;

}

inline void Cyg_HardwareThread::set_saved_context(HAL_SavedRegisters *ctx)

{

    saved_context = ctx;

}

#endif

// -------------------------------------------------------------------------

// (declare this inline before its first use)

inline cyg_uint16 Cyg_Thread::get_unique_id()

{

    return unique_id;

}

// -------------------------------------------------------------------------

// Initialize the context of this thread.

inline void Cyg_HardwareThread::init_context(Cyg_Thread *thread)

{

#ifdef CYGPKG_INFRA_DEBUG

    cyg_uint32 threadid = thread->get_unique_id()*0x01010000;

#else

    cyg_uint32 threadid = 0x11110000;

#endif

    HAL_THREAD_INIT_CONTEXT( stack_ptr, thread, thread_entry, threadid );

}

// -------------------------------------------------------------------------

// Save current thread's context and load that of the given next thread.

// This function is only really here for completeness, the

// kernel generally calls the HAL macros directly.

inline void Cyg_HardwareThread::switch_context(Cyg_HardwareThread *next)

{

    HAL_THREAD_SWITCH_CONTEXT( &stack_ptr, &next->stack_ptr );

}

// -------------------------------------------------------------------------

// Get and set entry_data.

inline void Cyg_HardwareThread::set_entry_data( CYG_ADDRWORD data )

{

    entry_data = data;

}

inline CYG_ADDRWORD Cyg_HardwareThread::get_entry_data()

{

    return entry_data;

}

// -------------------------------------------------------------------------

// Allocate some memory at the lower end of the stack

// by moving the stack limit pointer.

#ifdef CYGFUN_KERNEL_THREADS_STACK_LIMIT

#ifndef CYGFUN_KERNEL_THREADS_STACK_CHECKING

// if stack checking, implementation is in thread.cxx

inline void *Cyg_HardwareThread::increment_stack_limit( cyg_ucount32 size )

{

    void *ret = (void *)stack_limit;

    stack_limit += size;

    return ret;

}

#endif

inline CYG_ADDRESS

Cyg_HardwareThread::get_stack_limit()

{

    return stack_limit;

}

#endif

//==========================================================================

// Inlines for Cyg_Thread class

inline Cyg_Thread *Cyg_Thread::self()

{

    return Cyg_Scheduler::get_current_thread();

}

// -------------------------------------------------------------------------

inline void Cyg_Thread::yield()

{

    self()->Cyg_SchedThread::yield();

}

// -------------------------------------------------------------------------

inline void

Cyg_Thread::rotate_queue( cyg_priority pri )

{

    self()->Cyg_SchedThread::rotate_queue( pri );

}

// -------------------------------------------------------------------------

inline void

Cyg_Thread::to_queue_head( void )

{

    this->Cyg_SchedThread::to_queue_head();

}

// -------------------------------------------------------------------------

#ifdef CYGIMP_THREAD_PRIORITY

inline cyg_priority Cyg_Thread::get_priority()

{

#ifdef CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_SIMPLE

    // If we have an inherited priority, return our original

    // priority rather than the current one.

    if( priority_inherited ) return original_priority;

#endif

    return priority;

}

// Return the actual dispatching priority of the thread

// regardless of inheritance or scheduling concerns.

inline cyg_priority Cyg_Thread::get_current_priority()

{

    return priority;

}

#endif

// -------------------------------------------------------------------------

inline void Cyg_Thread::set_sleep_reason( cyg_reason reason)

{

    self()->sleep_reason = reason;

    self()->wake_reason = NONE;

}

// -------------------------------------------------------------------------

inline Cyg_Thread::cyg_reason Cyg_Thread::get_sleep_reason()

{

    return sleep_reason;

}

// -------------------------------------------------------------------------

inline void Cyg_Thread::set_wake_reason( cyg_reason reason )

{

    sleep_reason = NONE;

    wake_reason = reason;

}

// -------------------------------------------------------------------------

inline Cyg_Thread::cyg_reason Cyg_Thread::get_wake_reason()

{

    return wake_reason;

}

// -------------------------------------------------------------------------

inline void Cyg_Thread::set_timer(

    cyg_tick_count      trigger,

    cyg_reason          reason

)

{

#ifdef CYGFUN_KERNEL_THREADS_TIMER

    self()->sleep_reason = reason;

    self()->wake_reason = NONE;

    self()->timer.initialize( trigger);

#endif

}

// -------------------------------------------------------------------------

inline void Cyg_Thread::clear_timer()

{

#ifdef CYGFUN_KERNEL_THREADS_TIMER

    self()->timer.disable();

#endif

}

// -------------------------------------------------------------------------

#ifdef CYGVAR_KERNEL_THREADS_DATA

inline CYG_ADDRWORD Cyg_Thread::get_data( Cyg_Thread::cyg_data_index index )

{

    CYG_ASSERT( index < CYGNUM_KERNEL_THREADS_DATA_MAX,

                "Per thread data index out of bounds");

    CYG_ASSERT( (thread_data_map & (1<

                "Unallocated index used");

    return self()->thread_data[index];

}

inline CYG_ADDRWORD *Cyg_Thread::get_data_ptr( Cyg_Thread::cyg_data_index index )

{

    CYG_ASSERT( index < CYGNUM_KERNEL_THREADS_DATA_MAX,

                "Per thread data index out of bounds");

    CYG_ASSERT( (thread_data_map & (1<

                "Unallocated index used");

    return &(self()->thread_data[index]);

}

inline void Cyg_Thread::set_data( Cyg_Thread::cyg_data_index index,

                                  CYG_ADDRWORD data )

{

    CYG_ASSERT( index < CYGNUM_KERNEL_THREADS_DATA_MAX,

                "Per thread data index out of bounds");

    CYG_ASSERT( (thread_data_map & (1<

                "Unallocated index used");

    thread_data[index] = data;

}

#endif

// -------------------------------------------------------------------------

#ifdef CYGPKG_KERNEL_THREADS_DESTRUCTORS

// Add and remove destructors. Returns true on success, false on failure.

inline cyg_bool

Cyg_Thread::add_destructor( destructor_fn fn, CYG_ADDRWORD data )

{

    cyg_ucount16 i;

#ifndef CYGSEM_KERNEL_THREADS_DESTRUCTORS_PER_THREAD

    Cyg_Scheduler::lock();

#endif

    for (i=0; i

        if (NULL == destructors[i].fn) {

            destructors[i].data = data;

            destructors[i].fn = fn;

#ifndef CYGSEM_KERNEL_THREADS_DESTRUCTORS_PER_THREAD

            Cyg_Scheduler::unlock();

#endif

            return true;

        }

    }

#ifndef CYGSEM_KERNEL_THREADS_DESTRUCTORS_PER_THREAD

    Cyg_Scheduler::unlock();

#endif

    return false;

}

inline cyg_bool

Cyg_Thread::rem_destructor( destructor_fn fn, CYG_ADDRWORD data )

{

    cyg_ucount16 i;

#ifndef CYGSEM_KERNEL_THREADS_DESTRUCTORS_PER_THREAD

    Cyg_Scheduler::lock();

#endif

    for (i=0; i

        if (destructors[i].fn == fn && destructors[i].data == data) {

            destructors[i].fn = NULL;

#ifndef CYGSEM_KERNEL_THREADS_DESTRUCTORS_PER_THREAD

            Cyg_Scheduler::unlock();

#endif

            return true;

        }

    }

#ifndef CYGSEM_KERNEL_THREADS_DESTRUCTORS_PER_THREAD

    Cyg_Scheduler::unlock();

#endif

    return false;

}

#endif

// -------------------------------------------------------------------------

#ifdef CYGVAR_KERNEL_THREADS_NAME

inline char *Cyg_Thread::get_name()

{

    return name;

}

#endif

// -------------------------------------------------------------------------

#ifdef CYGVAR_KERNEL_THREADS_LIST

inline Cyg_Thread *Cyg_Thread::get_list_head()

{

    return thread_list?thread_list->list_next:0;

}

inline Cyg_Thread *Cyg_Thread::get_list_next()

{

    return (this==thread_list)?0:list_next;

}

#endif

// -------------------------------------------------------------------------

#ifdef CYGPKG_KERNEL_EXCEPTIONS

inline void Cyg_Thread::register_exception(

    cyg_code                exception_number,       // exception number

    cyg_exception_handler   handler,                // handler function

    CYG_ADDRWORD            data,                   // data argument

    cyg_exception_handler   **old_handler,          // handler function

    CYG_ADDRWORD            *old_data               // data argument

    )

{

    self()->exception_control.register_exception(

        exception_number,

        handler,

        data,

        old_handler,

        old_data

        );

}

inline void Cyg_Thread::deregister_exception(

    cyg_code                exception_number        // exception number

    )

{

    self()->exception_control.deregister_exception(

        exception_number

        );

}

#endif

//==========================================================================

// Inlines for Cyg_ThreadTimer class

// -------------------------------------------------------------------------

#if defined(CYGFUN_KERNEL_THREADS_TIMER) && defined(CYGVAR_KERNEL_COUNTERS_CLOCK)

inline Cyg_ThreadTimer::Cyg_ThreadTimer(

    Cyg_Thread  *th

    )

    : Cyg_Alarm(Cyg_Clock::real_time_clock,

                &alarm,

                CYG_ADDRWORD(this)

                )

{

    thread = th;

}

#endif

//==========================================================================

// Inlines for Cyg_ThreadQueue class

inline void Cyg_ThreadQueue::enqueue(Cyg_Thread *thread)

{

    Cyg_ThreadQueue_Implementation::enqueue(thread);

}

// -------------------------------------------------------------------------

inline Cyg_Thread *Cyg_ThreadQueue::highpri()

{

    return Cyg_ThreadQueue_Implementation::highpri();

}

// -------------------------------------------------------------------------

inline Cyg_Thread *Cyg_ThreadQueue::dequeue()

{

    return Cyg_ThreadQueue_Implementation::dequeue();

}

// -------------------------------------------------------------------------

inline void Cyg_ThreadQueue::remove(Cyg_Thread *thread)

{

    Cyg_ThreadQueue_Implementation::remove(thread);

}

// -------------------------------------------------------------------------

inline cyg_bool Cyg_ThreadQueue::empty()

{

    return Cyg_ThreadQueue_Implementation::empty();

}

// -------------------------------------------------------------------------

#endif // ifndef CYGONCE_KERNEL_THREAD_INL

// EOF thread.inl