X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/84a0b9d1947db0f61f3a82fb6df02add111fd62f..e6a8d8720982ba6b6e58c71ee002eab1b222e6ca:/src/gras/Transport/transport_private.h diff --git a/src/gras/Transport/transport_private.h b/src/gras/Transport/transport_private.h index f94b58b238..1a042182bb 100644 --- a/src/gras/Transport/transport_private.h +++ b/src/gras/Transport/transport_private.h @@ -4,48 +4,117 @@ /* 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" -#include "Transport/transport_interface.h" - -extern gras_dynar_t *_gras_trp_sockets; /* all existing sockets */ - +#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. + + 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. + + 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. */ - -struct s_gras_socket { - gras_trp_plugin_t *plugin; +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 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. */ - int incoming; /* true if incoming (server) sock, false if client sock */ - int accepting; /* true if master incoming sock in tcp */ + int recvd :1; /* true if the recvd_val field contains one byte of the stream (that we peek'ed to check the socket validity) */ + char recvd_val; /* what we peeked from the socket, if any */ - int sd; + unsigned long int buf_size; /* what to say to the OS. + Field here to remember it when accepting */ + + 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 *specific; /* plugin specific data */ -}; - - -/* TCP driver */ -gras_error_t gras_trp_tcp_init(gras_trp_plugin_t **dst); - -/* SG driver */ -gras_error_t gras_trp_sg_init (gras_trp_plugin_t **dst); - + 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); + +/* FIXME: this should be solved by SIMIX + + 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). + + Hu! You evil problem! Taste my axe! + +*/ + +gras_socket_t gras_trp_buf_init_sock(gras_socket_t sock); #endif /* GRAS_TRP_PRIVATE_H */