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#ifndef FISH_ENV_UNIVERSAL_COMMON_H
#define FISH_ENV_UNIVERSAL_COMMON_H
#include <wchar.h>
#include <queue>
#include "util.h"
/**
The set command
*/
#define SET_STR L"SET"
/**
The set_export command
*/
#define SET_EXPORT_STR L"SET_EXPORT"
/**
The erase command
*/
#define ERASE_STR L"ERASE"
/**
The barrier command
*/
#define BARRIER_STR L"BARRIER"
/**
The barrier_reply command
*/
#define BARRIER_REPLY_STR L"BARRIER_REPLY"
/**
The filename to use for univeral variables. The username is appended
*/
#define SOCK_FILENAME "fishd.socket."
/**
The different types of commands that can be sent between client/server
*/
enum
{
SET,
SET_EXPORT,
ERASE,
BARRIER,
BARRIER_REPLY,
}
;
/**
The size of the buffer used for reading from the socket
*/
#define ENV_UNIVERSAL_BUFFER_SIZE 1024
/**
A struct representing a message to be sent between client and server
*/
typedef struct
{
/**
Number of queues that contain this message. Once this reaches zero, the message should be deleted
*/
int count;
/**
Message body. The message must be allocated using enough memory to actually contain the message.
*/
char body[1];
}
message_t;
typedef std::queue<message_t *> message_queue_t;
/**
This struct represents a connection between a universal variable server/client
*/
typedef struct connection
{
/**
The file descriptor this socket lives on
*/
int fd;
/**
Queue of onsent messages
*/
message_queue_t *unsent;
/**
Set to one when this connection should be killed
*/
int killme;
/**
The input string. Input from the socket goes here. When a
newline is encountered, the buffer is parsed and cleared.
*/
std::vector<char> input;
/**
The read buffer.
*/
char buffer[ENV_UNIVERSAL_BUFFER_SIZE];
/**
Number of bytes that have already been consumed.
*/
int buffer_consumed;
/**
Number of bytes that have been read into the buffer.
*/
int buffer_used;
/**
Link to the next connection
*/
struct connection *next;
}
connection_t;
/**
Read all available messages on this connection
*/
void read_message( connection_t * );
/**
Send as many messages as possible without blocking to the connection
*/
void try_send_all( connection_t *c );
/**
Create a messge with the specified properties
*/
message_t *create_message( int type, const wchar_t *key, const wchar_t *val );
/**
Init the library
*/
void env_universal_common_init(void (*cb)(int type, const wchar_t *key, const wchar_t *val ) );
/**
Destroy library data
*/
void env_universal_common_destroy();
/**
Add all variable names to the specified list
This function operate agains the local copy of all universal
variables, it does not communicate with any other process.
*/
void env_universal_common_get_names( wcstring_list_t &lst,
int show_exported,
int show_unexported );
/**
Perform the specified variable assignment.
This function operate agains the local copy of all universal
variables, it does not communicate with any other process.
Do not call this function. Create a message to do it. This function
is only to be used when fishd is dead.
*/
void env_universal_common_set( const wchar_t *key, const wchar_t *val, int exportv );
/**
Remove the specified variable.
This function operate agains the local copy of all universal
variables, it does not communicate with any other process.
Do not call this function. Create a message to do it. This function
is only to be used when fishd is dead.
*/
void env_universal_common_remove( const wcstring &key );
/**
Get the value of the variable with the specified name
This function operate agains the local copy of all universal
variables, it does not communicate with any other process.
*/
wchar_t *env_universal_common_get( const wcstring &name );
/**
Get the export flag of the variable with the specified
name. Returns 0 if the variable doesn't exist.
This function operate agains the local copy of all universal
variables, it does not communicate with any other process.
*/
int env_universal_common_get_export( const wcstring &name );
/**
Add messages about all existing variables to the specified connection
*/
void enqueue_all( connection_t *c );
/**
Fill in the specified connection_t struct. Use the specified file
descriptor for communication.
*/
void connection_init( connection_t *c, int fd );
/**
Close and destroy the specified connection struct. This frees
allstructures allocated by the connection, such as ques of unsent
messages.
*/
void connection_destroy( connection_t *c);
#endif
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