X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/fe0df91ca00b102a1752d92b10f5401f0fbac577..94352664ec6e9949778a4cdfacb09f34af909de4:/src/gras_simix/Transport/gras_simix_transport_plugin_file.c diff --git a/src/gras_simix/Transport/gras_simix_transport_plugin_file.c b/src/gras_simix/Transport/gras_simix_transport_plugin_file.c new file mode 100644 index 0000000000..1b559697a1 --- /dev/null +++ b/src/gras_simix/Transport/gras_simix_transport_plugin_file.c @@ -0,0 +1,250 @@ +/* $Id$ */ + +/* File transport - send/receive a bunch of bytes from a file */ + +/* Copyright (c) 2004 Martin Quinson. All rights reserved. */ + +/* This program is free software; you can redistribute it and/or modify it + * under the terms of the license (GNU LGPL) which comes with this package. */ + +#include "portable.h" +#include "transport_private.h" +#include "xbt/ex.h" + +XBT_LOG_NEW_DEFAULT_SUBCATEGORY(gras_trp_file,gras_trp, + "Pseudo-transport to write to/read from a file"); + +/*** + *** Prototypes + ***/ +void gras_trp_file_close(gras_socket_t sd); + +void gras_trp_file_chunk_send_raw(gras_socket_t sd, + const char *data, + unsigned long int size); +void gras_trp_file_chunk_send(gras_socket_t sd, + const char *data, + unsigned long int size, + int stable_ignored); + +int gras_trp_file_chunk_recv(gras_socket_t sd, + char *data, + unsigned long int size); + +/*** + *** Specific plugin part + ***/ + +typedef struct { + fd_set incoming_socks; +} gras_trp_file_plug_data_t; + +/*** + *** Specific socket part + ***/ + + + +/*** + *** Code + ***/ +void +gras_trp_file_setup(gras_trp_plugin_t plug) { + + gras_trp_file_plug_data_t *file = xbt_new(gras_trp_file_plug_data_t,1); + + FD_ZERO(&(file->incoming_socks)); + + plug->socket_close = gras_trp_file_close; + + plug->raw_send = gras_trp_file_chunk_send_raw; + plug->send = gras_trp_file_chunk_send; + + plug->raw_recv = plug->recv = gras_trp_file_chunk_recv; + + plug->data = (void*)file; +} + +/** + * gras_socket_client_from_file: + * + * Create a client socket from a file path. + * + * This only possible in RL, and is mainly for debugging. + */ +gras_socket_t +gras_socket_client_from_file(const char*path) { + gras_socket_t res; + + xbt_assert0(gras_if_RL(), + "Cannot use file as socket in the simulator"); + + gras_trp_socket_new(0,&res); + + res->plugin=gras_trp_plugin_get_by_name("file"); + + if (strcmp("-", path)) { + res->sd = open(path, O_WRONLY|O_CREAT | O_BINARY, S_IRUSR|S_IWUSR|S_IRGRP ); + + if ( res->sd < 0) { + THROW2(system_error,0, + "Cannot create a client socket from file %s: %s", + path, strerror(errno)); + } + } else { + res->sd = 1; /* stdout */ + } + + res->recv_ok=0; + DEBUG5("sock_client_from_file(%s): sd=%d in=%c out=%c accept=%c", + path, + res->sd, + res->incoming?'y':'n', + res->outgoing?'y':'n', + res->accepting?'y':'n'); + + return res; +} + +/** + * gras_socket_server_from_file: + * + * Create a server socket from a file path. + * + * This only possible in RL, and is mainly for debugging. + */ +gras_socket_t gras_socket_server_from_file(const char*path) { + gras_socket_t res; + + xbt_assert0(gras_if_RL(), + "Cannot use file as socket in the simulator"); + + gras_trp_socket_new(1,&res); + + res->plugin=gras_trp_plugin_get_by_name("file"); + + + if (strcmp("-", path)) { + res->sd = open(path, O_RDONLY | O_BINARY); + + if ( res->sd < 0) { + THROW2(system_error,0, + "Cannot create a server socket from file %s: %s", + path, strerror(errno)); + } + } else { + res->sd = 0; /* stdin */ + } + + DEBUG4("sd=%d in=%c out=%c accept=%c", + res->sd, + res->incoming?'y':'n', + res->outgoing?'y':'n', + res->accepting?'y':'n'); + + res->recv_ok=0; + return res; +} + +void gras_trp_file_close(gras_socket_t sock){ + gras_trp_file_plug_data_t *data; + + if (!sock) return; /* close only once */ + data=sock->plugin->data; + + if (sock->sd == 0) { + DEBUG0("Do not close stdin"); + } else if (sock->sd == 1) { + DEBUG0("Do not close stdout"); + } else { + DEBUG1("close file connection %d", sock->sd); + + /* forget about the socket */ + FD_CLR(sock->sd, &(data->incoming_socks)); + + /* close the socket */ + if(close(sock->sd) < 0) { + WARN2("error while closing file %d: %s", + sock->sd, strerror(errno)); + } + } +} + +/** + * gras_trp_file_chunk_send: + * + * Send data on a file pseudo-socket + */ +void +gras_trp_file_chunk_send(gras_socket_t sock, + const char *data, + unsigned long int size, + int stable_ignored) { + gras_trp_file_chunk_send_raw(sock,data,size); +} +void +gras_trp_file_chunk_send_raw(gras_socket_t sock, + const char *data, + unsigned long int size) { + + xbt_assert0(sock->outgoing, "Cannot write on client file socket"); + xbt_assert0(size >= 0, "Cannot send a negative amount of data"); + + while (size) { + int status = 0; + + DEBUG3("write(%d, %p, %ld);", sock->sd, data, (long int)size); + status = write(sock->sd, data, (long int)size); + + if (status == -1) { + THROW4(system_error,0,"write(%d,%p,%d) failed: %s", + sock->sd, data, (int)size, + strerror(errno)); + } + + if (status) { + size -= status; + data += status; + } else { + THROW0(system_error,0,"file descriptor closed"); + } + } +} +/** + * gras_trp_file_chunk_recv: + * + * Receive data on a file pseudo-socket. + */ +int +gras_trp_file_chunk_recv(gras_socket_t sock, + char *data, + unsigned long int size) { + + int got = 0; + + xbt_assert0(sock, "Cannot recv on an NULL socket"); + xbt_assert0(sock->incoming, "Cannot recv on client file socket"); + xbt_assert0(size >= 0, "Cannot receive a negative amount of data"); + + while (size) { + int status = 0; + + status = read(sock->sd, data+got, (long int)size); + DEBUG3("read(%d, %p, %ld);", sock->sd, data+got, size); + + if (status == -1) { + THROW4(system_error,0,"read(%d,%p,%d) failed: %s", + sock->sd, data+got, (int)size, + strerror(errno)); + } + + if (status) { + size -= status; + got += status; + } else { + THROW0(system_error,0,"file descriptor closed"); + } + } + return got; +} +