103 строки
2.8 KiB
C
103 строки
2.8 KiB
C
/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University.
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* All rights reserved.
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* Copyright (c) 2004-2005 The Trustees of the University of Tennessee.
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* All rights reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#include "ompi_config.h"
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#include "opal/class/opal_free_list.h"
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#include "opal/include/sys/cache.h"
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static void opal_free_list_construct(opal_free_list_t* fl);
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static void opal_free_list_destruct(opal_free_list_t* fl);
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opal_class_t opal_free_list_t_class = {
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"opal_free_list_t",
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OBJ_CLASS(opal_list_t),
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(opal_construct_t)opal_free_list_construct,
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(opal_destruct_t)opal_free_list_destruct
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};
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static void opal_free_list_construct(opal_free_list_t* fl)
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{
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OBJ_CONSTRUCT(&fl->fl_lock, opal_mutex_t);
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fl->fl_max_to_alloc = 0;
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fl->fl_num_allocated = 0;
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fl->fl_num_per_alloc = 0;
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fl->fl_num_waiting = 0;
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fl->fl_elem_size = 0;
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fl->fl_elem_class = 0;
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}
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static void opal_free_list_destruct(opal_free_list_t* fl)
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{
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OBJ_DESTRUCT(&fl->fl_lock);
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}
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int opal_free_list_init(
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opal_free_list_t *flist,
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size_t elem_size,
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opal_class_t* elem_class,
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int num_elements_to_alloc,
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int max_elements_to_alloc,
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int num_elements_per_alloc)
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{
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flist->fl_elem_size = elem_size;
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flist->fl_elem_class = elem_class;
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flist->fl_max_to_alloc = max_elements_to_alloc;
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flist->fl_num_allocated = 0;
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flist->fl_num_per_alloc = num_elements_per_alloc;
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if(num_elements_to_alloc)
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return opal_free_list_grow(flist, num_elements_to_alloc);
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return OMPI_SUCCESS;
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}
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int opal_free_list_grow(opal_free_list_t* flist, size_t num_elements)
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{
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unsigned char* ptr;
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size_t i;
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size_t mod;
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if (flist->fl_max_to_alloc > 0 && flist->fl_num_allocated + num_elements > flist->fl_max_to_alloc)
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return OMPI_ERR_TEMP_OUT_OF_RESOURCE;
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ptr = (unsigned char *)malloc((num_elements * flist->fl_elem_size) + CACHE_LINE_SIZE);
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if(NULL == ptr)
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return OMPI_ERR_TEMP_OUT_OF_RESOURCE;
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mod = (unsigned long)ptr % CACHE_LINE_SIZE;
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if(mod != 0) {
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ptr += (CACHE_LINE_SIZE - mod);
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}
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for(i=0; i<num_elements; i++) {
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opal_free_list_item_t* item = (opal_free_list_item_t*)ptr;
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item->user_data = NULL;
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if (NULL != flist->fl_elem_class) {
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OBJ_CONSTRUCT_INTERNAL(item, flist->fl_elem_class);
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}
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opal_list_append(&(flist->super), &(item->super));
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ptr += flist->fl_elem_size;
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}
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flist->fl_num_allocated += num_elements;
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return OMPI_SUCCESS;
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}
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