GROS CHANTIER
This commit is contained in:
parent
ea882d37dc
commit
6df133c2c1
3
.gitignore
vendored
Normal file
3
.gitignore
vendored
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@ -0,0 +1,3 @@
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*.a
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*.so
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*.swp
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@ -72,6 +72,23 @@ int service_close (const char *fifopath)
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return 0;
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}
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struct process * srv_process_copy (const struct process *p)
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{
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if (p == NULL)
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return NULL;
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struct process * copy = malloc (sizeof(struct process));
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memcpy (copy, p, sizeof (struct process));
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return copy;
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}
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int srv_process_eq (const struct process *p1, const struct process *p2)
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{
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return (p1->pid == p2->pid && p1>version == p2->version
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&& p1->index == p2->index);
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}
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int service_get_new_process (struct process *proc, const char * spath)
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{
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if (spath == NULL) {
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@ -36,6 +36,10 @@ struct service {
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int service_path (char *buf, const char *sname);
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struct process * srv_process_copy (struct process *p);
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int srv_process_eq (const struct process *p1, const struct process *p2);
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void gen_process_structure (struct process *p
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, pid_t pid, unsigned int index, unsigned int version);
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@ -53,6 +57,7 @@ int service_get_new_process (struct process *proc, const char * spath);
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void service_get_new_processes (struct process ***, int *nproc, char *spath);
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void service_free_processes (struct process **, int nproc);
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void process_print (struct process *);
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int process_create (struct process *, int index); // called by the application
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int process_destroy (struct process *); // called by the application
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BIN
lib/communication.o
Normal file
BIN
lib/communication.o
Normal file
Binary file not shown.
171
lib/queue.h
Normal file
171
lib/queue.h
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@ -0,0 +1,171 @@
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/* $OpenBSD: queue.h,v 1.43 2015/12/28 19:38:40 millert Exp $ */
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/* $NetBSD: queue.h,v 1.11 1996/05/16 05:17:14 mycroft Exp $ */
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/*
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)queue.h 8.5 (Berkeley) 8/20/94
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*/
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#ifndef _SYS_QUEUE_H_
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#define _SYS_QUEUE_H_
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/*
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* This file defines five types of data structures: singly-linked lists,
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* lists, simple queues, tail queues and XOR simple queues.
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*
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*
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* A singly-linked list is headed by a single forward pointer. The elements
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* are singly linked for minimum space and pointer manipulation overhead at
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* the expense of O(n) removal for arbitrary elements. New elements can be
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* added to the list after an existing element or at the head of the list.
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* Elements being removed from the head of the list should use the explicit
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* macro for this purpose for optimum efficiency. A singly-linked list may
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* only be traversed in the forward direction. Singly-linked lists are ideal
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* for applications with large datasets and few or no removals or for
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* implementing a LIFO queue.
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*
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* A list is headed by a single forward pointer (or an array of forward
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* pointers for a hash table header). The elements are doubly linked
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* so that an arbitrary element can be removed without a need to
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* traverse the list. New elements can be added to the list before
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* or after an existing element or at the head of the list. A list
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* may only be traversed in the forward direction.
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*
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* A simple queue is headed by a pair of pointers, one to the head of the
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* list and the other to the tail of the list. The elements are singly
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* linked to save space, so elements can only be removed from the
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* head of the list. New elements can be added to the list before or after
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* an existing element, at the head of the list, or at the end of the
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* list. A simple queue may only be traversed in the forward direction.
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*
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* A tail queue is headed by a pair of pointers, one to the head of the
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* list and the other to the tail of the list. The elements are doubly
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* linked so that an arbitrary element can be removed without a need to
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* traverse the list. New elements can be added to the list before or
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* after an existing element, at the head of the list, or at the end of
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* the list. A tail queue may be traversed in either direction.
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*
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* An XOR simple queue is used in the same way as a regular simple queue.
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* The difference is that the head structure also includes a "cookie" that
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* is XOR'd with the queue pointer (first, last or next) to generate the
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* real pointer value.
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*
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* For details on the use of these macros, see the queue(3) manual page.
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*/
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#if defined(QUEUE_MACRO_DEBUG) || (defined(_KERNEL) && defined(DIAGNOSTIC))
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#define _Q_INVALIDATE(a) (a) = ((void *)-1)
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#else
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#define _Q_INVALIDATE(a)
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#endif
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/*
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* List definitions.
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*/
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#define LIST_HEAD(name, type) \
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struct name { \
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struct type *lh_first; /* first element */ \
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}
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#define LIST_HEAD_INITIALIZER(head) \
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{ NULL }
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#define LIST_ENTRY(type) \
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struct { \
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struct type *le_next; /* next element */ \
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struct type **le_prev; /* address of previous next element */ \
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}
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/*
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* List access methods.
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*/
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#define LIST_FIRST(head) ((head)->lh_first)
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#define LIST_END(head) NULL
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#define LIST_EMPTY(head) (LIST_FIRST(head) == LIST_END(head))
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#define LIST_NEXT(elm, field) ((elm)->field.le_next)
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#define LIST_FOREACH(var, head, field) \
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for((var) = LIST_FIRST(head); \
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(var)!= LIST_END(head); \
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(var) = LIST_NEXT(var, field))
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#define LIST_FOREACH_SAFE(var, head, field, tvar) \
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for ((var) = LIST_FIRST(head); \
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(var) && ((tvar) = LIST_NEXT(var, field), 1); \
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(var) = (tvar))
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/*
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* List functions.
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*/
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#define LIST_INIT(head) do { \
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LIST_FIRST(head) = LIST_END(head); \
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} while (0)
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#define LIST_INSERT_AFTER(listelm, elm, field) do { \
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if (((elm)->field.le_next = (listelm)->field.le_next) != NULL) \
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(listelm)->field.le_next->field.le_prev = \
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&(elm)->field.le_next; \
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(listelm)->field.le_next = (elm); \
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(elm)->field.le_prev = &(listelm)->field.le_next; \
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} while (0)
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#define LIST_INSERT_BEFORE(listelm, elm, field) do { \
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(elm)->field.le_prev = (listelm)->field.le_prev; \
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(elm)->field.le_next = (listelm); \
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*(listelm)->field.le_prev = (elm); \
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(listelm)->field.le_prev = &(elm)->field.le_next; \
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} while (0)
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#define LIST_INSERT_HEAD(head, elm, field) do { \
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if (((elm)->field.le_next = (head)->lh_first) != NULL) \
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(head)->lh_first->field.le_prev = &(elm)->field.le_next;\
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(head)->lh_first = (elm); \
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(elm)->field.le_prev = &(head)->lh_first; \
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} while (0)
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#define LIST_REMOVE(elm, field) do { \
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if ((elm)->field.le_next != NULL) \
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(elm)->field.le_next->field.le_prev = \
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(elm)->field.le_prev; \
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*(elm)->field.le_prev = (elm)->field.le_next; \
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_Q_INVALIDATE((elm)->field.le_prev); \
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_Q_INVALIDATE((elm)->field.le_next); \
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} while (0)
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#define LIST_REPLACE(elm, elm2, field) do { \
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if (((elm2)->field.le_next = (elm)->field.le_next) != NULL) \
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(elm2)->field.le_next->field.le_prev = \
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&(elm2)->field.le_next; \
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(elm2)->field.le_prev = (elm)->field.le_prev; \
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*(elm2)->field.le_prev = (elm2); \
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_Q_INVALIDATE((elm)->field.le_prev); \
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_Q_INVALIDATE((elm)->field.le_next); \
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} while (0)
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#endif /* _SYS_QUEUE_H_ */
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22
pubsub/Makefile
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22
pubsub/Makefile
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@ -0,0 +1,22 @@
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CC=gcc
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CFLAGS=-Wall -g
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LDFLAGS=
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CFILES=$(wildcard *.c) # CFILES => recompiles everything on a C file change
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EXEC=$(basename $(wildcard *.c))
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SOURCES=$(wildcard ../lib/*.c)
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OBJECTS=$(SOURCES:.c=.o)
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TESTS=$(addsuffix .test, $(EXEC))
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all: $(SOURCES) $(EXEC)
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$(EXEC): $(OBJECTS) $(CFILES)
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$(CC) $(CFLAGS) $(LDFLAGS) $(OBJECTS) $@.c -o $@
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.c.o:
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$(CC) -c $(CFLAGS) $< -o $@
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clean:
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-rm $(OBJECTS)
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mrproper: clean
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rm $(EXEC)
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@ -1,48 +0,0 @@
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#include <stdlib.h>
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#include "list.h"
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List*
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list_new(size_t element_size)
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{
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List* l = malloc(sizeof(*l));
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l->element_size = element_size;
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l->head = NULL;
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l->tail = NULL;
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l->length = 0;
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return l;
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}
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void*
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list_append(List* l)
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{
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struct link* link = malloc(sizeof(*link) + l->element_size);
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link->next = l->tail;
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l->tail = link;
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if (!l->head)
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l->tail = link;
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l->length++;
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return (void*) link->value;
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}
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void
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list_free(List* l)
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{
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struct link* next;
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struct link* link;
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for (link = l->head; link; link = next) {
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next = link->next;
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free(link);
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}
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free(l);
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}
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@ -1,23 +0,0 @@
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#ifndef LIST_H
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#define LIST_H
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struct link {
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struct link* next;
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char value[];
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};
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typedef struct {
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struct link* head;
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struct link* tail;
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size_t element_size;
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size_t length;
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} List;
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List* list_new(size_t);
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void* list_append(List*);
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void list_remove(List*, size_t);
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void list_free(List*);
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#endif
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254
pubsub/pubsubd.c
254
pubsub/pubsubd.c
@ -1,91 +1,191 @@
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#include "../lib/communication.h"
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#include <stdlib.h>
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#include <communication.h>
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#include "list.h"
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typedef struct {
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int test;
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} Publisher;
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typedef struct {
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int test;
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} Subscriber;
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const char* service_name = "pubsub";
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void
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ohshit(int rvalue, const char* str) {
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fprintf(stderr, "%s\n", str);
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exit(rvalue);
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fprintf(stderr, "%s\n", str);
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exit(rvalue);
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}
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// init lists
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void pubsubd_channels_init (struct channels *chans) { LIST_INIT(chans); }
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void pubsubd_subscriber_init (struct app_list *al) { LIST_INIT(al); }
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int
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main(int argc, char* argv[])
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pubsubd_channels_eq (const struct channel *c1, const struct channel *c2)
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{
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List* subscribers;
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List* publishers;
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int r;
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char s_path[PATH_MAX];
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int s_pipe;
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return (strncmp (c1->chan, c2->chan, c1->chanlen) == 0);
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}
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struct channels * pubsubd_channels_copy (struct channels *c);
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(void) argc;
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(void) argv;
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void
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pubsubd_channels_add (struct channels *chans, struct channels *c)
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{
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if(!chans || !c)
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return;
|
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service_path(s_path, service_name);
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printf("Listening on %s.\n", s_path);
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if ((r = service_create(s_path)))
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ohshit(1, "service_create error");
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publishers = list_new(sizeof(Publisher));
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subscribers = list_new(sizeof(Subscriber));
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if (!publishers && !subscribers)
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ohshit(1, "out of memory, already...");
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/* ?!?!?!?!? */
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mkfifo(s_path, S_IRUSR);
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s_pipe = open(s_path, S_IRUSR);
|
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|
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for (;;) {
|
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struct process* proc;
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int proc_count, i;
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||||
|
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service_get_new_processes(&proc, &proc_count, s_pipe);
|
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|
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printf("> %i proc\n", proc_count);
|
||||
|
||||
for (i = 0; i < proc_count; i++) {
|
||||
size_t message_size = BUFSIZ;
|
||||
char buffer[BUFSIZ];
|
||||
|
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process_print(proc + i);
|
||||
|
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if ((r = process_read(&proc[i], &buffer, &message_size))) {
|
||||
ohshit(1, "process_read error");
|
||||
}
|
||||
|
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printf(": %s\n", buffer);
|
||||
|
||||
|
||||
}
|
||||
|
||||
service_free_processes(&proc, proc_count);
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
close(s_pipe);
|
||||
|
||||
list_free(publishers);
|
||||
list_free(subscribers);
|
||||
|
||||
service_close(s_path);
|
||||
|
||||
return 0;
|
||||
struct process *n = pubsubd_channels_copy (c);
|
||||
LIST_INSERT_HEAD(al, n, entries);
|
||||
}
|
||||
|
||||
void
|
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pubsubd_subscriber_del (struct app_list *al, struct process *p)
|
||||
{
|
||||
struct process *todel = srv_subscriber_get (al, p);
|
||||
if(todel != NULL) {
|
||||
LIST_REMOVE(todel, entries);
|
||||
srv_process_free (mfree, todel);
|
||||
mfree (todel);
|
||||
todel = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
pubsubd_subscriber_add (struct app_list *al, struct process *p)
|
||||
{
|
||||
if(!al || !p)
|
||||
return;
|
||||
|
||||
struct process *n = srv_process_copy (p);
|
||||
LIST_INSERT_HEAD(al, n, entries);
|
||||
}
|
||||
|
||||
struct process *
|
||||
pubsubd_subscriber_get (const struct app_list *al
|
||||
, const struct process *p)
|
||||
{
|
||||
struct process *np, *res = NULL;
|
||||
LIST_FOREACH(np, al, entries) {
|
||||
if(srv_process_eq (np, p)) {
|
||||
res = np;
|
||||
}
|
||||
}
|
||||
return res;
|
||||
}
|
||||
|
||||
void
|
||||
pubsubd_subscriber_del (struct app_list *al, struct process *p)
|
||||
{
|
||||
struct process *todel = srv_subscriber_get (al, p);
|
||||
if(todel != NULL) {
|
||||
LIST_REMOVE(todel, entries);
|
||||
srv_process_free (mfree, todel);
|
||||
mfree (todel);
|
||||
todel = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
void pubsubd_msg_send (struct service *s, struct message * m, struct process *p)
|
||||
{
|
||||
}
|
||||
void pubsubd_msg_recv (struct service *s, struct message * m, struct process *p)
|
||||
{
|
||||
}
|
||||
void pubsub_msg_send (struct service *s, struct message * m)
|
||||
{
|
||||
}
|
||||
void pubsub_msg_recv (struct service *s, struct message * m)
|
||||
{
|
||||
}
|
||||
|
||||
int
|
||||
main(int argc, char* argv[])
|
||||
{
|
||||
// gets the service path, such as /tmp/<service>
|
||||
char s_path[PATH_MAX];
|
||||
service_path (s_path, service_name);
|
||||
printf ("Listening on %s.\n", s_path);
|
||||
|
||||
// creates the service named pipe, that listens to client applications
|
||||
if (service_create (s_path))
|
||||
ohshit(1, "service_create error");
|
||||
|
||||
struct channels chans;
|
||||
pubsubd_channels_init (&chans);
|
||||
|
||||
for (;;) {
|
||||
struct process proc;
|
||||
int proc_count, i;
|
||||
|
||||
service_get_new_process (&proc, s_path);
|
||||
|
||||
printf("> %i proc\n", proc_count);
|
||||
|
||||
for (i = 0; i < proc_count; i++) {
|
||||
size_t message_size = BUFSIZ;
|
||||
char buffer[BUFSIZ];
|
||||
|
||||
process_print(proc + i);
|
||||
|
||||
if (process_read (&proc[i], &buffer, &message_size))
|
||||
ohshit(1, "process_read error");
|
||||
|
||||
printf(": %s\n", buffer);
|
||||
|
||||
|
||||
}
|
||||
|
||||
service_free_processes(&proc, proc_count);
|
||||
}
|
||||
|
||||
// the application will shut down, and remove the service named pipe
|
||||
if (service_close (s_path))
|
||||
ohshit(1, "service_close error");
|
||||
|
||||
return EXIT_SUCCESS;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* main loop
|
||||
*
|
||||
* opens the application pipes,
|
||||
* reads then writes the same message,
|
||||
* then closes the pipes
|
||||
*/
|
||||
|
||||
void main_loop (const char *spath)
|
||||
{
|
||||
int ret;
|
||||
struct process proc;
|
||||
|
||||
int cnt = 10;
|
||||
|
||||
while (cnt--) {
|
||||
// -1 : error, 0 = no new process, 1 = new process
|
||||
ret = service_get_new_process (&proc, spath);
|
||||
if (ret == -1) {
|
||||
fprintf (stderr, "error service_get_new_process\n");
|
||||
continue;
|
||||
} else if (ret == 0) { // that should not happen
|
||||
continue;
|
||||
}
|
||||
|
||||
// printf ("before print\n");
|
||||
process_print (&proc);
|
||||
// printf ("after print\n");
|
||||
|
||||
// about the message
|
||||
size_t msize = BUFSIZ;
|
||||
char buf[BUFSIZ];
|
||||
bzero(buf, BUFSIZ);
|
||||
|
||||
// printf ("before read\n");
|
||||
if ((ret = service_read (&proc, &buf, &msize))) {
|
||||
fprintf(stdout, "error service_read %d\n", ret);
|
||||
continue;
|
||||
}
|
||||
// printf ("after read\n");
|
||||
printf ("read, size %ld : %s\n", msize, buf);
|
||||
|
||||
// printf ("before proc write\n");
|
||||
if ((ret = service_write (&proc, &buf, msize))) {
|
||||
fprintf(stdout, "error service_write %d\n", ret);
|
||||
continue;
|
||||
}
|
||||
// printf ("after proc write\n");
|
||||
printf ("\033[32mStill \033[31m%d\033[32m applications to serve\n",cnt);
|
||||
}
|
||||
}
|
||||
|
41
pubsub/pubsubd.h
Normal file
41
pubsub/pubsubd.h
Normal file
@ -0,0 +1,41 @@
|
||||
#ifndef __PUBSUBD_H__
|
||||
#define __PUBSUBD_H__
|
||||
|
||||
#include "queue.h"
|
||||
|
||||
struct message {
|
||||
unsigned char *chan;
|
||||
size_t chanlen;
|
||||
unsigned char *data;
|
||||
size_t datalen;
|
||||
unsigned char type; // message type : alert, notification, …
|
||||
};
|
||||
|
||||
struct channel {
|
||||
unsigned char *chan;
|
||||
size_t chanlen;
|
||||
};
|
||||
|
||||
struct channels {
|
||||
struct channel *chan;
|
||||
LIST_ENTRY(channels) entries;
|
||||
};
|
||||
|
||||
int pubsubd_channels_eq (const struct channels *c1, const struct channels *c2);
|
||||
|
||||
struct app_list {
|
||||
struct process *p;
|
||||
LIST_ENTRY(app_list) entries;
|
||||
};
|
||||
|
||||
void pubsubd_msg_send (struct service *, struct message *msg, struct process *p);
|
||||
void pubsubd_msg_recv (struct service *, struct message *msg, struct process *p);
|
||||
|
||||
struct process * pubsubd_subscriber_get (const struct app_list *
|
||||
, const struct process *);
|
||||
void pubsubd_subscriber_del (struct app_list *al, struct process *p);
|
||||
|
||||
void pubsub_msg_send (struct service *, struct message *msg);
|
||||
void pubsub_msg_recv (struct service *, struct message *msg);
|
||||
|
||||
#endif
|
Reference in New Issue
Block a user