X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/afb6a920a5fb4da71b20d3653e67ff9c48f45dcb..895151199518c0d298bd36eb6839453f8ede4e09:/src/gras/Transport/transport_private.h diff --git a/src/gras/Transport/transport_private.h b/src/gras/Transport/transport_private.h index bef632eb3b..becb2627aa 100644 --- a/src/gras/Transport/transport_private.h +++ b/src/gras/Transport/transport_private.h @@ -1,115 +1,109 @@ /* $Id$ */ -/* trp (transport) - send/receive a bunch of bytes */ +/* transport - low level communication (send/receive bunches of bytes) */ -/* This file implements the public interface of this module, exported to the*/ -/* other modules of GRAS, but not to the end user. */ +/* module's private interface masked even to other parts of GRAS. */ -/* Authors: Martin Quinson */ -/* Copyright (C) 2004 Martin Quinson. */ +/* 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. */ + * under the terms of the license (GNU LGPL) which comes with this package. */ #ifndef GRAS_TRP_PRIVATE_H #define GRAS_TRP_PRIVATE_H -#include "gras_private.h" -/* A low-level socket type (each plugin implements it the way it prefers */ -//typedef void gras_trp_sock_t; - -/* A plugin type */ -struct gras_trp_plugin_ { - const char *name; - - gras_error_t (*init)(void); - void (*exit)(gras_trp_plugin_t *); +#include "xbt/sysdep.h" +#include "xbt/log.h" +#include "xbt/dynar.h" +#include "xbt/dict.h" + +#include "gras/emul.h" /* gras_if_RL() */ + +#include "gras_modinter.h" /* module init/exit */ +#include "gras/transport.h" /* rest of module interface */ + +#include "gras/Transport/transport_interface.h" /* semi-public API */ +#include "gras/Virtu/virtu_interface.h" /* libdata management */ + +extern int gras_trp_libdata_id; /* our libdata identifier */ + +/* The function that select returned the last time we asked. We need this because the TCP read + are greedy and try to get as much data in their buffer as possible (to avoid subsequent syscalls). + (measurement sockets are not buffered and thus not concerned). + + So, we can get more than one message in one shoot. And when this happens, we have to handle + the same socket again afterward without select()ing at all. - gras_error_t (*socket_client_open)(const char *host, - unsigned short port, - int raw, - unsigned int bufSize, - /* OUT */ gras_trp_sock_t **dst); - gras_error_t (*socket_server_open)(unsigned short port, - int raw, - unsigned int bufSize, - /* OUT */ gras_trp_sock_t **dst); - void (*socket_close)(gras_trp_sock_t **sd); + Then, this data is not a static of the TCP driver because we want to zero it when + it gets closed by the user. If not, we use an already freed pointer, which is bad. - gras_error_t (*select)(double timeOut, - gras_trp_sock_t **sd); + It gets tricky since gras_socket_close is part of the common API, not only the RL one. */ +extern gras_socket_t _gras_lastly_selected_socket; + +/** + * s_gras_socket: + * + * Description of a socket. + */ +typedef struct gras_trp_bufdata_ gras_trp_bufdata_t; + +typedef struct s_gras_socket { + gras_trp_plugin_t plugin; + + int incoming :1; /* true if we can read from this sock */ + int outgoing :1; /* true if we can write on this sock */ + int accepting :1; /* true if master incoming sock in tcp */ + int meas :1; /* true if this is an experiment socket instead of messaging */ + int recv_ok :1; /* true if it is valid to recv() on the socket (false if it is a file) */ + int valid :1; /* false if a select returned that the peer quitted, forcing us to "close" the socket */ + int moredata :1; /* TCP socket use a buffer and read operation get as much data as possible. + It is possible that several messages are received in one shoot, and select won't catch them afterward again. + This boolean indicates that this is the case, so that we don't call select in that case. + Note that measurement sockets are not concerned since they use the TCP interface directly, with no buffer. */ + + unsigned long int buf_size; /* what to say to the OS. field here to remember it when accepting */ - gras_error_t (*bloc_send)(gras_trp_sock_t *sd, - void *data, - size_t size, - double timeOut); - gras_error_t (*bloc_recv)(gras_trp_sock_t *sd, - void *data, - size_t size, - double timeOut); - gras_error_t (*flush)(gras_trp_sock_t *sd); - - void *specific; -}; - -/********************************************************************** - * Internal stuff to the module. Other modules shouldn't fool with it * - **********************************************************************/ - -/* TCP driver */ -gras_error_t gras_trp_tcp_init(void); -void gras_trp_tcp_exit(gras_trp_plugin_t *plugin); -gras_error_t gras_trp_tcp_socket_client(const char *host, - unsigned short port, - int raw, - unsigned int bufSize, - /* OUT */ gras_trp_sock_t **dst); -gras_error_t gras_trp_tcp_socket_server(unsigned short port, - int raw, - unsigned int bufSize, - /* OUT */ gras_trp_sock_t **dst); -void gras_trp_tcp_socket_close(gras_trp_sock_t **sd); -gras_error_t gras_trp_tcp_select(double timeOut, - gras_trp_sock_t **sd); + int sd; + int port; /* port on this side */ + int peer_port; /* port on the other side */ + char *peer_name; /* hostname of the other side */ + char *peer_proc; /* process on the other side */ + + void *data; /* plugin specific data */ + + /* buffer plugin specific data. Yeah, C is not OO, so I got to trick */ + gras_trp_bufdata_t *bufdata; +}s_gras_socket_t; + +void gras_trp_socket_new(int incomming, + gras_socket_t *dst); + +/* The drivers */ +typedef void (*gras_trp_setup_t)(gras_trp_plugin_t dst); + +void gras_trp_tcp_setup(gras_trp_plugin_t plug); +void gras_trp_iov_setup(gras_trp_plugin_t plug); +void gras_trp_file_setup(gras_trp_plugin_t plug); +void gras_trp_sg_setup(gras_trp_plugin_t plug); + +/* + + I'm tired of that shit. the select in SG has to create a socket to expeditor + manually do deal with the weirdness of the hostdata, themselves here to deal + with the weird channel concept of SG and convert them back to ports. + + When introducing buffered transport (which I want to get used in SG to debug + the buffering itself), we should not make the rest of the code aware of the + change and not specify code for this. This is bad design. + + But there is bad design all over the place, so fuck off for now, when we can + get rid of MSG and rely directly on SG, this crude hack can go away. But in + the meanwhile, I want to sleep this night (FIXME). -gras_error_t gras_trp_tcp_bloc_send(gras_trp_sock_t *sd, - void *data, - size_t size, - double timeOut); - -gras_error_t gras_trp_tcp_bloc_recv(gras_trp_sock_t *sd, - void *data, - size_t size, - double timeOut); -gras_error_t gras_trp_tcp_flush(gras_trp_sock_t *sd); - -/* SG driver */ -gras_error_t gras_trp_sg_init(void); -void gras_trp_sg_exit(gras_trp_plugin_t *plugin); -gras_error_t gras_trp_sg_socket_client(const char *host, - unsigned short port, - int raw, - unsigned int bufSize, - /* OUT */ gras_trp_sock_t **dst); -gras_error_t gras_trp_sg_socket_server(unsigned short port, - int raw, - unsigned int bufSize, - /* OUT */ gras_trp_sock_t **dst); -void gras_trp_sg_socket_close(gras_trp_sock_t **sd); -gras_error_t gras_trp_sg_select(double timeOut, - gras_trp_sock_t **sd); - -gras_error_t gras_trp_sg_bloc_send(gras_trp_sock_t *sd, - void *data, - size_t size, - double timeOut); - -gras_error_t gras_trp_sg_bloc_recv(gras_trp_sock_t *sd, - void *data, - size_t size, - double timeOut); -gras_error_t gras_trp_sg_flush(gras_trp_sock_t *sd); + Hu! You evil problem! Taste my axe! +*/ +gras_socket_t gras_trp_buf_init_sock(gras_socket_t sock); #endif /* GRAS_TRP_PRIVATE_H */