300 строки
9.9 KiB
C
300 строки
9.9 KiB
C
/*
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* Copyright (c) 2004-2010 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2005 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* 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 (c) 2007 Sun Microsystems, Inc. All rights reserved.
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* Copyright (c) 2008-2010 Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2010 Los Alamos National Security, LLC.
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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 <errno.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif /* HAVE_STRING_H */
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#endif /* HAVE_FCNTL_H */
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#ifdef HAVE_TIME_H
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#include <time.h>
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#endif /* HAVE_TIME_H */
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#ifdef HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#endif /* HAVE_SYS_STAT_H */
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#ifdef HAVE_SYS_MMAN_H
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#include <sys/mman.h>
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#endif
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#include "opal/util/output.h"
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#include "opal/util/path.h"
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#include "opal/align.h"
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#include "opal/threads/mutex.h"
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#include "opal/util/opal_sos.h"
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#include "orte/util/name_fns.h"
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#include "orte/util/show_help.h"
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#include "orte/runtime/orte_globals.h"
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#include "orte/mca/errmgr/errmgr.h"
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#include "ompi/constants.h"
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#include "ompi/proc/proc.h"
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#include "ompi/mca/dpm/dpm.h"
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#include "ompi/mca/mpool/sm/mpool_sm.h"
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#include "common_sm_windows.h"
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OBJ_CLASS_INSTANCE(
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mca_common_sm_module_windows_t,
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opal_object_t,
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NULL,
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NULL
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);
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/******************************************************************************/
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/**
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* mca_common_sm_windows_component_query
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*/
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int
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mca_common_sm_windows_component_query(void)
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{
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return OMPI_SUCCESS;
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}
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mca_common_sm_module_t *
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mca_common_sm_windows_init(ompi_proc_t **procs,
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size_t num_procs,
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size_t size, char *file_name,
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size_t size_ctl_structure,
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size_t data_seg_alignment)
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{
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int fd = -1, return_code = OMPI_SUCCESS;
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bool file_previously_opened = false;
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mca_common_sm_seg_header_t* seg = NULL;
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mca_common_sm_module_windows_t* map = NULL;
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unsigned char *addr = NULL;
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size_t tmp, mem_offset;
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HANDLE hMapObject = INVALID_HANDLE_VALUE;
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LPVOID lpvMem = NULL;
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char *temp1, *temp2;
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int rc;
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/**
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* On Windows the shared file will be created by the OS directly on
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* the system ressources. Therefore, no file get involved in the
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* operation. However, a unique key should be used as name for the
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* shared memory object in order to allow all processes to access
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* the same unique shared memory region. The key will be obtained
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* from the original file_name by replacing all path separator
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* occurences by '/' (as '\' is not allowed on the object name).
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*/
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temp1 = strdup(file_name);
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temp2 = temp1;
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while( NULL != (temp2 = strchr(temp2, OPAL_PATH_SEP[0])) ) {
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*temp2 = '/';
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}
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hMapObject = CreateFileMapping( INVALID_HANDLE_VALUE, /* use paging file */
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NULL, /* no security attributes */
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PAGE_READWRITE, /* read/write access */
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0, /* size: high 32-bits */
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(DWORD)size, /* size: low 32-bits */
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temp1); /* name of map object */
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if( NULL == hMapObject ) {
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rc = GetLastError();
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goto return_error;
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}
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if( ERROR_ALREADY_EXISTS == GetLastError() )
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file_previously_opened=true;
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free(temp1); /* relase the temporary file name */
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/* Get a pointer to the file-mapped shared memory. */
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lpvMem = MapViewOfFile( hMapObject, /* object to map view of */
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FILE_MAP_WRITE, /* read/write access */
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0, /* high offset: map from */
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0, /* low offset: beginning */
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0); /* default: map entire file */
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if( NULL == lpvMem ) {
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rc = GetLastError();
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goto return_error;
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}
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seg = (mca_common_sm_seg_header_t*)lpvMem;
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/* set up the map object */
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map = OBJ_NEW(mca_common_sm_module_windows_t);
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strncpy(map->super.module_seg_path, file_name, OPAL_PATH_MAX);
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/* the first entry in the file is the control structure. The first
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entry in the control structure is an mca_common_sm_seg_header_t
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element */
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map->super.module_seg = seg;
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/* If we have a data segment (i.e., if 0 != data_seg_alignment),
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then make it the first aligned address after the control
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structure. */
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if (0 != data_seg_alignment) {
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addr = ((unsigned char *) seg) + size_ctl_structure;
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/* calculate how far off alignment we are */
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tmp = ((size_t) addr) % data_seg_alignment;
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/* if we're off alignment, then move up to the next alignment */
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if( tmp > 0 )
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addr += (data_seg_alignment - tmp);
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/* is addr past end of file ? */
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if( (unsigned char*)seg+size < addr ) {
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opal_output(0, "mca_common_sm_init: memory region too small len %d addr %p\n",
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size,addr);
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goto return_error;
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}
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map->super.module_data_addr = addr;
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} else {
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map->super.module_data_addr = NULL;
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}
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mem_offset = addr-(unsigned char *)seg;
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map->super.module_seg_addr = (unsigned char *)seg;
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map->super.module_size = size;
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/* initialize the segment - only the first process to open the file */
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if( !file_previously_opened ) {
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opal_atomic_unlock(&seg->seg_lock);
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seg->seg_inited = false;
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seg->seg_offset = mem_offset;
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/* initialize size after subtracting out space used by the header */
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seg->seg_size = size - mem_offset;
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}
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map->super.hMappedObject = hMapObject;
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return (mca_common_sm_module_t *)map;
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return_error:
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{
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char* localbuf = NULL;
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FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
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NULL, rc, 0, (LPTSTR)&localbuf, 1024, NULL );
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opal_output( 0, "%s\n", localbuf );
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LocalFree( localbuf );
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}
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if( NULL != lpvMem ) UnmapViewOfFile( lpvMem );
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if( NULL != hMapObject ) CloseHandle(hMapObject);
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return NULL;
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}
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/*
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* Same as mca_common_sm_windows_init(), but takes an (ompi_group_t*)
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* argument instead of na array of ompi_proc_t's.
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*
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* This function just checks the group to ensure that all the procs
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* are local, and if they are, calls mca_common_sm_windows_init().
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*/
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mca_common_sm_module_t *
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mca_common_sm_windows_init_group(ompi_group_t *group,
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size_t size,
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char *file_name,
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size_t size_ctl_structure,
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size_t data_seg_alignment)
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{
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size_t i, group_size;
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ompi_proc_t *proc, **procs;
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mca_common_sm_module_t *ret;
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group_size = ompi_group_size(group);
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procs = (ompi_proc_t**) malloc(sizeof(ompi_proc_t*) * group_size);
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if (NULL == procs) {
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return NULL;
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}
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for (i = 0; i < group_size; ++i) {
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proc = ompi_group_peer_lookup(group,i);
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if (!OPAL_PROC_ON_LOCAL_NODE(proc->proc_flags)) {
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free(procs);
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return NULL;
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}
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procs[i] = proc;
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}
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ret = mca_common_sm_windows_init(procs, group_size, size, file_name,
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size_ctl_structure, data_seg_alignment);
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free(procs);
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return ret;
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}
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int
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mca_common_sm_windows_fini(mca_common_sm_module_t *mca_common_sm_module)
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{
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mca_common_sm_module_windows_t *windows_module =
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(mca_common_sm_module_windows_t *)mca_common_sm_module;
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int rc = OMPI_SUCCESS;
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if( NULL != windows_module->super.module_seg ) {
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BOOL return_error = UnmapViewOfFile( windows_module->super.module_seg_addr );
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if( false == return_error ) {
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rc = GetLastError();
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}
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CloseHandle(windows_module->super.hMappedObject);
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}
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return rc;
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}
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/**
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* allocate memory from a previously allocated shared memory
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* block.
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*
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* @param size size of request, in bytes (IN)
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*
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* @retval addr virtual address
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*/
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void *
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mca_common_sm_windows_seg_alloc(struct mca_mpool_base_module_t* mpool,
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size_t* size,
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mca_mpool_base_registration_t** registration)
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{
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mca_mpool_sm_module_t *sm_module = (mca_mpool_sm_module_t*) mpool;
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mca_common_sm_module_windows_t *map =
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(mca_common_sm_module_windows_t *)sm_module->sm_common_module;
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mca_common_sm_seg_header_t* seg = map->super.module_seg;
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void* addr;
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opal_atomic_lock(&seg->seg_lock);
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if(seg->seg_offset + *size > seg->seg_size) {
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addr = NULL;
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} else {
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size_t fixup;
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/* add base address to segment offset */
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addr = map->super.module_data_addr + seg->seg_offset;
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seg->seg_offset += *size;
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/* fix up seg_offset so next allocation is aligned on a
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sizeof(long) boundry. Do it here so that we don't have to
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check before checking remaining size in buffer */
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if ((fixup = (seg->seg_offset & (sizeof(long) - 1))) > 0) {
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seg->seg_offset += sizeof(long) - fixup;
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}
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}
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if (NULL != registration) {
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*registration = NULL;
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}
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opal_atomic_unlock(&seg->seg_lock);
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return addr;
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}
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