diff options
Diffstat (limited to 'src/plugins')
| -rw-r--r-- | src/plugins/Makefile | 6 | ||||
| -rw-r--r-- | src/plugins/console.c | 498 | ||||
| -rw-r--r-- | src/plugins/console.def | 4 |
3 files changed, 392 insertions, 116 deletions
diff --git a/src/plugins/Makefile b/src/plugins/Makefile index 7d100e591..989ae0939 100644 --- a/src/plugins/Makefile +++ b/src/plugins/Makefile @@ -1,5 +1,5 @@ -OBJECTS = sample.dll sig.dll pid.dll gui.dll upnp.dll httpd.dll +OBJECTS = sample.dll sig.dll pid.dll gui.dll upnp.dll httpd.dll console.dll ifdef CYGWIN PLUGINEXT = dll @@ -8,7 +8,7 @@ else endif PLUGINS = $(OBJECTS:%.dll=%.$(PLUGINEXT)) -COMMON_H = ../common/plugin.h +COMMON_H = ../common/plugin.h ../common/cbasetypes.h txt sql all: $(PLUGINS) @@ -40,7 +40,7 @@ upnp.$(PLUGINEXT): ../../plugins/upnp.conf ../../plugins/upnp.conf: upnp.txt depend: - makedepend -fGNUmakefile -o.$(PLUGINEXT) -Y. -Y../common *.c + makedepend -fGNUmakefile -o.$(PLUGINEXT) -Y. -Y../common *.c $(PLUGINS:%=../../plugins/%) clean: rm -rf $(PLUGINS) GNUmakefile diff --git a/src/plugins/console.c b/src/plugins/console.c index e9fceecbf..e80843944 100644 --- a/src/plugins/console.c +++ b/src/plugins/console.c @@ -14,52 +14,82 @@ #endif #include <stdio.h> // stdin, fgets +#define INPUT_BUFSIZE 4096 +#define INPUT_INVALID 0 +#define INPUT_READY 1 +#define INPUT_WAITING 2 +#define INPUT_READING 3 +#define INPUT_CLOSED 4 + +////////////////////////////// #ifdef WIN32 +////////////////////////////// -#define THREAD_FUNC_START(name) DWORD WINAPI thread_ ## name(LPVOID lpParameter) { (void)lpParameter; { -#define THREAD_FUNC_END(name) } ExitThread(0); return 0; } -#define THREAD_EXECUTE(name,errvar) \ +// In windows the worker is a thread so it can access the same variables. +#define WORKER_FUNC_DECLARE(name) DWORD WINAPI worker_ ## name(LPVOID lpParameter) +#define WORKER_FUNC_START(name) DWORD WINAPI worker_ ## name(LPVOID lpParameter) { (void)lpParameter; { +#define WORKER_FUNC_END(name) } ExitThread(0); return 0; } +#define WORKER_EXECUTE(name,errvar) \ do{ \ - int _fail_ = (CreateThread(NULL,0,thread_ ## name,NULL,0,NULL) == NULL); \ + buf.worker = CreateThread(NULL, 0, worker_ ## name, NULL, CREATE_SUSPENDED, NULL); \ if( errvar ) \ - *errvar = _fail_; \ + *errvar = ( buf.worker == NULL ); \ }while(0) -#define sleep Sleep -#define pipe_create(p) (CreatePipe(&p[PIPE_READ], &p[PIPE_WRITE], NULL, 1) == 0) -#define pipe_read(p,data,len) do{ DWORD _b_; ReadFile(p[PIPE_READ], data, len, &_b_, NULL); }while(0) -#define pipe_write(p,data,len) do{ DWORD _b_; WriteFile(p[PIPE_WRITE], data, len, &_b_, NULL); }while(0) -#define pipe_close(p,side) CloseHandle(p[side]) -typedef HANDLE PIPE[2]; +/// Buffer for asynchronous input +typedef struct _buffer { + char arr[INPUT_BUFSIZE]; + size_t len; + HANDLE worker; + HANDLE state_mux; // mutex for the state + char state; +} BUFFER; +////////////////////////////// #else +////////////////////////////// -#define THREAD_FUNC_START(name) void thread_ ## name(void) { -#define THREAD_FUNC_END(name) _exit(0); } -#define THREAD_EXECUTE(name,errvar) \ +/// In linux the worker is a process so it needs to comunicate through pipes. +#define WORKER_FUNC_DECLARE(name) void worker_ ## name(void) +#define WORKER_FUNC_START(name) void worker_ ## name(void) { +#define WORKER_FUNC_END(name) _exit(0); } +#define WORKER_EXECUTE(name,errvar) \ do{ \ int pid = fork(); \ if( pid == 0 ){ \ - thread_ ## name(); \ + worker_ ## name(); \ } \ if( errvar ) \ *errvar = (pid == -1); \ }while(0) -#define pipe_create(p) pipe(p) -#define pipe_read(p,data,len) read(p[PIPE_READ], data, len) -#define pipe_write(p,data,len) write(p[PIPE_WRITE], data, len) -#define pipe_close(p,side) close(p[side]) -typedef int PIPE[2]; +#define PIPE_READ 0 +#define PIPE_WRITE 1 +/// Buffer for asynchronous input +typedef struct _buffer { + char arr[INPUT_BUFSIZE]; + size_t len; + int data_pipe[2]; // pipe to receive data + int state_pipe[2]; // pipe to send state + char state; + unsigned close_unused_flag : 1; +} BUFFER; + +////////////////////////////// #endif +////////////////////////////// + + + -#define PIPE_READ 0 -#define PIPE_WRITE 1 -#define INPUT_BUFSIZE 4096 ////// Plugin information //////// -// + + + + + PLUGIN_INFO = { "Console", // Name PLUGIN_ALL, // Target servers @@ -76,15 +106,26 @@ PLUGIN_INFO = { // So it's up to your creativity ^^ // PLUGIN_EVENTS_TABLE = { - { "console_init", EVENT_PLUGIN_INIT }, - { "console_final", EVENT_PLUGIN_FINAL }, - { "console_start", EVENT_ATHENA_INIT }, - { "console_stop", EVENT_ATHENA_FINAL }, + { "console_init", EVENT_PLUGIN_INIT }, + { "console_final", EVENT_PLUGIN_FINAL }, + { "console_autostart", EVENT_ATHENA_INIT }, + //{ "console_start", EVENT_CONSOLE_START },//## add these events to the plugins framework + //{ "console_stop", EVENT_CONSOLE_STOP }, + { "console_stop", EVENT_ATHENA_FINAL }, { NULL, NULL } }; + + + + ///// Variables ///// + + + + +// Imported functions typedef int TimerFunc(int tid, unsigned int tick, int id, int data); int (*add_timer_func_list)(TimerFunc func, char* name); int (*add_timer_interval)(unsigned int tick, TimerFunc* func, int id, int data, int interval); @@ -92,118 +133,354 @@ int (*delete_timer)(int tid, TimerFunc* func); unsigned int (*gettick)(void); int (*parse_console)(char* buf); -int tid; -PIPE data; -PIPE next; +// Locals +int tid; // timer id +BUFFER buf; // input buffer +WORKER_FUNC_DECLARE(getinput); // worker for the input buffer -//////// Plugin functions ////////// -static int pipe_hasdata(PIPE p) -{ + + + +//////// Asynchronous input functions ////////// + + + + + +////////////////////////////// #ifdef WIN32 - return ( WaitForSingleObject(p[PIPE_READ],0) == WAIT_OBJECT_0 ); +////////////////////////////// +// +// --=== Asynchronous console input ===-- +// +// On windows a thread is used (both threads have access to the same data). +// The worker threads starts suspended and is resumed when data is required. +// After getting the data, the worker thread updates the state variable and +// suspends itself. +// +// A mutex is used to synchronize access to the state variable between the +// threads. Access and updates to state are probably already atomic so the +// mutex shouldn't be needed, but using it is more correct so it stays. +// +// Note: The Worker thread only starts to get input data when further data is +// requested. This is a design choise and brings no real advantage or +// disadvantage I can think of. +// + +/// Returns the state of the input +char input_getstate() +{ + char state; + + WaitForSingleObject(buf.state_mux, INFINITE); + state = buf.state; + ReleaseMutex(buf.state_mux); + + return state; +} + +/// Sets the state of the input +void input_setstate(char state) +{ + char oldstate; + + // update state + WaitForSingleObject(buf.state_mux, INFINITE); + oldstate = buf.state; + buf.state = state; + ReleaseMutex(buf.state_mux); + + if( state == INPUT_READY && oldstate == INPUT_READING ) + {// data has become available + SuspendThread(buf.worker); + } else if( state == INPUT_WAITING ) + {// input is waiting for data + ResumeThread(buf.worker); + //} else if( state == INPUT_READING ) + //{// worker is reading data + } else if( state == INPUT_CLOSED ) + {// end the input + CloseHandle(buf.state_mux); + TerminateThread(buf.worker, 0); + } +} + +/// Gets the next state of the input +#define input_nextstate() input_getstate() + +/// Returns if data is available from asynchronous input. +/// Requests data if none is available. +int input_hasdata(void) +{ + if( input_getstate() == INPUT_READY ) + {// buffer is ready + if( buf.len > 0 ) + return 1; // data found ;) + // request data from the worker + input_setstate(INPUT_WAITING); + } + return 0; // no data +} + +/// Initialize asynchronous input +int input_init(void) +{ + int err = 0; + + memset(&buf, 0, sizeof(buf)); + buf.state_mux = CreateMutex(NULL, FALSE, NULL); + if( buf.state_mux == NULL ) + {// failed to create state mutex + return 1; + } + buf.len = 0; + input_setstate(INPUT_READY); + WORKER_EXECUTE(getinput, &err); + if( err ) + {// failed to start worker + input_setstate(INPUT_CLOSED); + } + + return err; +} + +/// Finalize asynchronous input +int input_final(void) +{ + input_setstate(INPUT_CLOSED); + return 0; +} + +////////////////////////////// #else +////////////////////////////// +// +// --=== Asynchronous console input ===-- +// +// On the other systems a process is used and pipes are used to comunicate. +// The worker process receives status updates through one of the pipes either +// requesting data or ending the worker. +// The other pipe is used by the worker to send the input data and is checked +// for data by the main thread in the timer function. +// +// Note: The Worker thread only starts to get input data when further data is +// requested. This is a design choise and brings no real advantage or +// disadvantage I can think of. +// + +/// Returns the state of the input +#define input_getstate() buf.state + +/// Sets the state of the input +void input_setstate(char state) +{ + if( state == INPUT_READY && input_getstate() == INPUT_READING ) + {// send data from the worker to the main process + write(buf.data_pipe[PIPE_WRITE], &buf.len, sizeof(buf.len)); + write(buf.data_pipe[PIPE_WRITE], &buf.arr, buf.len); + } else if( state == INPUT_WAITING ){ + if( buf.close_unused_flag == 0 ) + {// close unused pipe sides in the main process + close(buf.data_pipe[PIPE_WRITE]); + close(buf.state_pipe[PIPE_READ]); + buf.close_unused_flag = 1; + } + // send the next state + write(buf.state_pipe[PIPE_WRITE], &state, sizeof(state)); + } else if( state == INPUT_READING ){ + if( buf.close_unused_flag == 0 ) + {// close unused pipe sides in the worker process + close(buf.data_pipe[PIPE_READ]); + close(buf.state_pipe[PIPE_WRITE]); + buf.close_unused_flag = 1; + } + } else if( state == INPUT_CLOSED ) + {// send next state to the worker and close the pipes + write(buf.state_pipe[PIPE_WRITE], &state, sizeof(state)); + close(buf.data_pipe[PIPE_WRITE]); + close(buf.data_pipe[PIPE_READ]); + close(buf.state_pipe[PIPE_WRITE]); + close(buf.state_pipe[PIPE_READ]); + } + buf.state = state; +} + +/// Waits for the next state of the input +char input_nextstate() +{ + char state = INPUT_CLOSED; + int bytes = 0; + + while( bytes == 0 ) + bytes = read(buf.state_pipe[PIPE_READ], &state, sizeof(state)); + if( bytes == -1 ) + {// error, terminate worker + input_setstate(INPUT_CLOSED); + } + return state; +} + +/// Returns if data is available from asynchronous input. +/// If data is available, it's put in the local buffer. +int input_hasdata() +{ struct pollfd fds; - fds.fd = p[PIPE_READ]; + int hasData; + + if( input_getstate() == INPUT_READY ) + {// start getting data + input_setstate(INPUT_WAITING); + return 0; + } + // check if data is available + fds.fd = buf.data_pipe[PIPE_READ]; fds.events = POLLRDNORM; - return ( poll(&fds,1,0) > 0 ); -#endif + hasData = ( poll(&fds,1,0) > 0 ); + if( hasData ) + {// read the data from the pipe + read(buf.data_pipe[PIPE_READ], &buf.len, sizeof(buf.len)); + read(buf.data_pipe[PIPE_READ], buf.arr, buf.len); + input_setstate(INPUT_READY); + } + + return hasData; } -int console_parsebuf(int tid, unsigned int tick, int id, int data_) +/// Initialize asynchronous input +int input_init(void) { - //printf("console_parsebuf\n"); - //delete_timer(tid, console_parsebuf); - if( pipe_hasdata(data) ){ - char buf[INPUT_BUFSIZE]; - size_t len; - //printf("console_parsebuf pipe_hasdata\n"); - // receive string - pipe_read(data, &len, sizeof(size_t)); - pipe_read(data, buf, len); - buf[len] = '\0'; - //printf("console_parsebuf buf='%s'\n", buf); - // parse it - parse_console(buf); - //printf("console_parsebuf writing next\n"); - // send next state - buf[0] = 'R'; - pipe_write(next, buf, 1); - //printf("console_parsebuf done with next\n"); + int err = 0; + + memset(&buf, 0, sizeof(buf)); + if( pipe(buf.data_pipe) ) + {// error creating data pipe + return 1; } + if( pipe(buf.state_pipe) ) + {// error creating state pipe + close(buf.data_pipe[PIPE_READ]); + close(buf.data_pipe[PIPE_WRITE]); + return 1; + } + buf.len = 0; + input_setstate(INPUT_READY); + WORKER_EXECUTE(getinput, &err); + if( err ){ + //printf("input_init failed to start worker (%d)\n", err); + input_setstate(INPUT_CLOSED); + } + + return err; +} + +/// Finalize asynchronous input +int input_final(void) +{ + close(buf.data_pipe[PIPE_READ]); + close(buf.data_pipe[PIPE_WRITE]); + close(buf.state_pipe[PIPE_READ]); + close(buf.state_pipe[PIPE_WRITE]); return 0; } -THREAD_FUNC_START(readinput) - char buf[INPUT_BUFSIZE]; - char state = 'R'; +////////////////////////////// +#endif +////////////////////////////// + + + +/// Returns the input data array +#define input_getdata() buf.arr + +/// Returns the input data length +#define input_getlen() buf.len + +/// Clear the input data +#define input_clear() ( buf.len = 0 ) + +/// Worker thread/process that gets input +WORKER_FUNC_START(getinput) + while( input_nextstate() != INPUT_CLOSED ) + {// get input + input_setstate(INPUT_READING); + buf.arr[0] = '\0'; + fgets(buf.arr, INPUT_BUFSIZE-1, stdin); + buf.len = strlen(buf.arr); + input_setstate(INPUT_READY); + } +WORKER_FUNC_END(getinput) + + + + + +//////// Plugin console functions ////////// + + + + + +/// Timer function that checks if there's assynchronous input data and feeds parse_console() +/// The input reads one line at a time and line terminators are removed. +int console_getinputtimer(int tid, unsigned int tick, int id, int data) +{ + char* cmd; size_t len; - //printf("thread_readinput START\n"); - pipe_close(data, PIPE_READ); - pipe_close(next, PIPE_WRITE); - buf[sizeof(buf)-1] = '\0'; - for( ; state != 'X'; ) - { - //printf("thread_readinput getting data\n"); - buf[0] = '\0'; - fgets(buf, sizeof(buf)-1, stdin); - len = strlen(buf); - //printf("thread_readinput buf='%s'\n", buf); - // send string - pipe_write(data, &len, sizeof(size_t)); - pipe_write(data, buf, len); - // receive next state - pipe_read(next, &state, sizeof(char)); + if( input_hasdata() ){ + + // get data (removes line terminators) + cmd = input_getdata(); + len = input_getlen(); + while( len > 0 && (cmd[len-1] == '\r' || cmd[len-1] == '\n') ) + cmd[--len] = '\0'; + + // parse data + parse_console(cmd); + input_clear(); } - pipe_close(data, PIPE_WRITE); - pipe_close(next, PIPE_READ); - //printf("thread_readinput STOP (%d)\n", state); -THREAD_FUNC_END(readinput) + return 0; +} + +/// Start the console void console_start(void) { - int error = 0; - //printf("console_start\n"); - if( pipe_create(data) ){ - //printf("console_start data pipe failed\n"); - return; - } - if( pipe_create(next) ){ - //printf("console_start next pipe failed\n"); - pipe_close(data, PIPE_READ); - pipe_close(data, PIPE_WRITE); + if( input_init() ){ return; } - THREAD_EXECUTE(readinput, &error); - if( error ){ - //printf("console_start thread start error\n"); - pipe_close(data, PIPE_READ); - pipe_close(next, PIPE_WRITE); - } else { - //printf("console_start thread started\n"); - //parse_console("help"); - add_timer_func_list(console_parsebuf,"console_parsebuf"); - tid = add_timer_interval(gettick(),console_parsebuf,0,0,1); // run once every cycle - } - pipe_close(data, PIPE_WRITE); - pipe_close(next, PIPE_READ); + //##TODO add a 'startupcmd' config options + //parse_console("help"); + add_timer_func_list(console_getinputtimer,"console_getinputtimer"); + tid = add_timer_interval(gettick(),console_getinputtimer,0,0,250);//##TODO add a 'timerperiod' config option } +void console_autostart(void) +{//##TODO add an 'autostart' config option + console_start(); +} + +/// Stop the console void console_stop(void) { - char c = 'X'; - //printf("console_stop\n"); if( tid != -1 ){ - delete_timer(tid, console_parsebuf); - pipe_write(next, &c, sizeof(char)); + delete_timer(tid, console_getinputtimer); + input_final(); } return; } +/// Test the console for compatibility +int console_test(void) +{// always compatible at the moment, maybe test if standard input is available? + return 1; +} + + +/// Initialize the console void console_init(void) { - //printf("console_init\n"); // import symbols IMPORT_SYMBOL(add_timer_interval, SYMBOL_ADD_TIMER_INTERVAL); IMPORT_SYMBOL(add_timer_func_list, SYMBOL_ADD_TIMER_FUNC_LIST); @@ -215,12 +492,9 @@ void console_init(void) //printf("%d -> delete_timer=0x%x\n", SYMBOL_DELETE_TIMER, (int)delete_timer); //printf("%d -> gettick=0x%x\n", SYMBOL_GETTICK, (int)gettick); //printf("%d -> parse_console=0x%x\n", SYMBOL_PARSE_CONSOLE, (int)parse_console); - - return; } +/// Finalize the console void console_final(void) { - //printf("console_final\n"); - return; } diff --git a/src/plugins/console.def b/src/plugins/console.def index a47800bef..df4bd1d46 100644 --- a/src/plugins/console.def +++ b/src/plugins/console.def @@ -5,7 +5,9 @@ EXPORTS plugin_call_table DATA ; console-specific exports - console_init + console_init console_final + console_test + console_autostart console_start console_stop |