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SPACEMAN.C
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C/C++ Source or Header
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1992-03-25
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/*
* Copyright (c) 1987, 1988, 1989 Stanford University
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided
* that the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Stanford not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. Stanford makes no representations about
* the suitability of this software for any purpose. It is provided "as is"
* without express or implied warranty.
*
* STANFORD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
* IN NO EVENT SHALL STANFORD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Each host has an object space manager that is a switchboard
* for naming spaces.
*/
#include <InterViews/spaceman.h>
#include <InterViews/chief.h>
#include <InterViews/connection.h>
//#include <os/fs.h>
//#include <os/host.h>
//#include <os/proc.h>
#include <dir.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
const char* spaceman_dir = "/tmp/.allegro";
const char* spaceman_mgr = "/tmp/.allegro/spaceman";
const char* spaceman_name = "/tmp/.allegro/p%5d";
static const int spaceman_namelen = 21;
inline void fatal (const char* s) {
perror(s);
exit(1);
}
SpaceManager::SpaceManager () {
Connection* c;
char cwd[1024];
int* tag;
void* tmp;
c = new Connection;
if (!c->OpenLocalService(spaceman_mgr)) {
fatal("can't connect to space manager");
}
chief = new ChiefDeputy(c);
hostname[0] = '\0';
chief->Alloc(tmp, chief->Tag(), 0, sizeof(int));
tag = (int*)tmp;
*tag = Tag();
getcwd(cwd, 1024);
UsePath(cwd);
}
SpaceManager::~SpaceManager () {
delete chief;
}
void SpaceManager::UsePath (const char* s) {
chief->StringMsg(Tag(), spaceman_UsePath, s);
}
void SpaceManager::Register (const char* name, Connection* a, Connection*) {
int* msg;
void* tmp;
int pid = 0; //getpid();
sprintf(filename, spaceman_name, pid);
a->CreateLocalService(filename);
int n = strlen(name);
chief->Alloc(tmp, Tag(), spaceman_Register, sizeof(int) + n + 1);
msg = (int*)tmp;
msg[0] = pid;
chief->PackString(name, n, &msg[1]);
chief->Sync();
}
void SpaceManager::UnRegister (const char* name) {
chief->StringMsg(Tag(), spaceman_UnRegister, name);
chief->Sync();
}
Connection* SpaceManager::Find (const char* name, boolean wait) {
int pid;
Connection* c;
char* local;
chief->StringMsg(Tag(), wait ? spaceman_WaitFor : spaceman_Find, name);
chief->GetReply(&pid, sizeof(pid));
if (pid == 0) {
c = nil;
} else {
c = new Connection;
local = new char[spaceman_namelen];
sprintf(local, spaceman_name, pid);
if (!c->OpenLocalService(local)) {
fatal("can't open local service");
}
}
return c;
}