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/**
* coopgammad -- Cooperative gamma server
* Copyright (C) 2016 Mattias Andrée (maandree@kth.se)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef STATE_H
#define STATE_H
#include "types/message.h"
#include "types/ring.h"
#include "types/output.h"
#include <libgamma.h>
#include <stddef.h>
#include <signal.h>
#ifndef GCC_ONLY
# if defined(__GNUC__) && !defined(__clang__)
# define GCC_ONLY(...) __VA_ARGS__
# else
# define GCC_ONLY(...) /* nothing */
# endif
#endif
/**
* The name of the process
*/
extern char* restrict argv0;
/**
* The real pathname of the process's binary,
* `NULL` if `argv0` is satisfactory
*/
extern char* restrict argv0_real;
/**
* Array of all outputs
*/
extern struct output* restrict outputs;
/**
* The nubmer of elements in `outputs`
*/
extern size_t outputs_n;
/**
* The server socket's file descriptor
*/
extern int socketfd;
/**
* Has the process receive a signal
* telling it to re-execute?
*/
extern volatile sig_atomic_t reexec;
/**
* Has the process receive a signal
* telling it to terminate?
*/
extern volatile sig_atomic_t terminate;
/**
* Has the process receive a to
* disconnect from or reconnect to
* the site? 1 if disconnct, 2 if
* reconnect, 0 otherwise.
*/
extern volatile sig_atomic_t connection;
/**
* List of all client's file descriptors
*
* Unused slots, with index less than `connections_used`,
* should have the value -1 (negative)
*/
extern int* restrict connections;
/**
* The number of elements allocated for `connections`
*/
extern size_t connections_alloc;
/**
* The index of the first unused slot in `connections`
*/
extern size_t connections_ptr;
/**
* The index of the last used slot in `connections`, plus 1
*/
extern size_t connections_used;
/**
* The clients' connections' inbound-message buffers
*/
extern struct message* restrict inbound;
/**
* The clients' connections' outbound-message buffers
*/
extern struct ring* restrict outbound;
/**
* Is the server connect to the display?
*
* Set to true before the initial connection
*/
extern int connected;
/**
* The adjustment method, -1 for automatic
*/
extern int method;
/**
* The site's name, may be `NULL`
*/
extern char* restrict sitename;
/**
* The libgamma site state
*/
extern libgamma_site_state_t site;
/**
* The libgamma partition states
*/
extern libgamma_partition_state_t* restrict partitions;
/**
* The libgamma CRTC states
*/
extern libgamma_crtc_state_t* restrict crtcs;
/**
* Destroy the state
*/
void state_destroy(void);
/**
* Marshal the state
*
* @param buf Output buffer for the marshalled data,
* `NULL` to only measure how many bytes
* this buffer needs
* @return The number of marshalled bytes
*/
size_t state_marshal(void* restrict buf);
/**
* Unmarshal the state
*
* @param buf Buffer for the marshalled data
* @return The number of unmarshalled bytes, 0 on error
*/
GCC_ONLY(__attribute__((nonnull)))
size_t state_unmarshal(const void* restrict buf);
#endif
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