#include <sys/poll.h>
Go to the source code of this file.
Defines | |
#define | AST_IO_IN POLLIN |
#define | AST_IO_OUT POLLOUT |
#define | AST_IO_PRI POLLPRI |
#define | AST_IO_ERR POLLERR |
#define | AST_IO_HUP POLLHUP |
#define | AST_IO_NVAL POLLNVAL |
#define | AST_IO_CB(a) ((ast_io_cb)(a)) |
Typedefs | |
typedef int(* | ast_io_cb )(int *id, int fd, short events, void *cbdata) |
Functions | |
io_context * | io_context_create (void) |
Creates a context. | |
void | io_context_destroy (struct io_context *ioc) |
Destroys a context. | |
int * | ast_io_add (struct io_context *ioc, int fd, ast_io_cb callback, short events, void *data) |
Adds an IO context. | |
int * | ast_io_change (struct io_context *ioc, int *id, int fd, ast_io_cb callback, short events, void *data) |
Changes an IO handler. | |
int | ast_io_remove (struct io_context *ioc, int *id) |
Removes an IO context. | |
int | ast_io_wait (struct io_context *ioc, int howlong) |
Waits for IO. | |
void | ast_io_dump (struct io_context *ioc) |
Dumps the IO array. | |
int | ast_hide_password (int fd) |
Set fd into non-echoing mode (if fd is a tty). | |
int | ast_restore_tty (int fd, int oldstatus) |
Restores TTY mode. | |
int | ast_get_termcols (int fd) |
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Error condition (errno or getsockopt) |
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Hangup |
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Input ready Definition at line 28 of file io.h. Referenced by ast_rtp_new(). |
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Invalid fd |
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Output ready |
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Priority input ready |
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Definition at line 66 of file io.h. Referenced by ast_io_add(), and ast_io_change(). |
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Definition at line 341 of file io.c.
00342 { 00343 struct winsize win; 00344 int cols = 0; 00345 00346 if (!isatty(fd)) 00347 return -1; 00348 00349 if ( ioctl(fd, TIOCGWINSZ, &win) != -1 ) { 00350 if ( !cols && win.ws_col > 0 ) 00351 cols = (int) win.ws_col; 00352 } else { 00353 /* assume 80 characters if the ioctl fails for some reason */ 00354 cols = 80; 00355 } 00356 00357 return cols; 00358 } |
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Set fd into non-echoing mode (if fd is a tty).
Definition at line 305 of file io.c.
00306 { 00307 struct termios tios; 00308 int res; 00309 int old; 00310 if (!isatty(fd)) 00311 return -1; 00312 res = tcgetattr(fd, &tios); 00313 if (res < 0) 00314 return -1; 00315 old = tios.c_lflag & (ECHO | ECHONL); 00316 tios.c_lflag &= ~ECHO; 00317 tios.c_lflag |= ECHONL; 00318 res = tcsetattr(fd, TCSAFLUSH, &tios); 00319 if (res < 0) 00320 return -1; 00321 return old; 00322 } |
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Adds an IO context.
Definition at line 139 of file io.c. References ast_io_cb, ast_log(), io_rec::callback, io_rec::data, DEBUG, pollfd::events, pollfd::fd, io_context::fdcnt, io_context::fds, io_rec::id, io_context::ior, LOG_DEBUG, malloc, and io_context::maxfdcnt. Referenced by ast_rtp_new().
00140 { 00141 /* 00142 * Add a new I/O entry for this file descriptor 00143 * with the given event mask, to call callback with 00144 * data as an argument. Returns NULL on failure. 00145 */ 00146 int *ret; 00147 DEBUG(ast_log(LOG_DEBUG, "ast_io_add()\n")); 00148 if (ioc->fdcnt >= ioc->maxfdcnt) { 00149 /* 00150 * We don't have enough space for this entry. We need to 00151 * reallocate maxfdcnt poll fd's and io_rec's, or back out now. 00152 */ 00153 if (io_grow(ioc)) 00154 return NULL; 00155 } 00156 00157 /* 00158 * At this point, we've got sufficiently large arrays going 00159 * and we can make an entry for it in the pollfd and io_r 00160 * structures. 00161 */ 00162 ioc->fds[ioc->fdcnt].fd = fd; 00163 ioc->fds[ioc->fdcnt].events = events; 00164 ioc->ior[ioc->fdcnt].callback = callback; 00165 ioc->ior[ioc->fdcnt].data = data; 00166 ioc->ior[ioc->fdcnt].id = (int *)malloc(sizeof(int)); 00167 /* Bonk if we couldn't allocate an int */ 00168 if (!ioc->ior[ioc->fdcnt].id) 00169 return NULL; 00170 *(ioc->ior[ioc->fdcnt].id) = ioc->fdcnt; 00171 ret = ioc->ior[ioc->fdcnt].id; 00172 ioc->fdcnt++; 00173 return ret; 00174 } |
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Changes an IO handler.
Definition at line 176 of file io.c. References ast_io_cb, io_rec::callback, io_rec::data, pollfd::events, pollfd::fd, io_context::fdcnt, io_context::fds, and io_context::ior.
00177 { 00178 if (*id < ioc->fdcnt) { 00179 if (fd > -1) 00180 ioc->fds[*id].fd = fd; 00181 if (callback) 00182 ioc->ior[*id].callback = callback; 00183 if (events) 00184 ioc->fds[*id].events = events; 00185 if (data) 00186 ioc->ior[*id].data = data; 00187 return id; 00188 } else return NULL; 00189 } |
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Dumps the IO array.
Definition at line 281 of file io.c. References ast_log(), io_rec::callback, io_rec::data, pollfd::events, pollfd::fd, io_context::fdcnt, io_context::fds, io_rec::id, io_context::ior, LOG_DEBUG, and io_context::maxfdcnt.
00282 { 00283 /* 00284 * Print some debugging information via 00285 * the logger interface 00286 */ 00287 int x; 00288 ast_log(LOG_DEBUG, "Asterisk IO Dump: %d entries, %d max entries\n", ioc->fdcnt, ioc->maxfdcnt); 00289 ast_log(LOG_DEBUG, "================================================\n"); 00290 ast_log(LOG_DEBUG, "| ID FD Callback Data Events |\n"); 00291 ast_log(LOG_DEBUG, "+------+------+-----------+-----------+--------+\n"); 00292 for (x=0;x<ioc->fdcnt;x++) { 00293 ast_log(LOG_DEBUG, "| %.4d | %.4d | %p | %p | %.6x |\n", 00294 *ioc->ior[x].id, 00295 ioc->fds[x].fd, 00296 ioc->ior[x].callback, 00297 ioc->ior[x].data, 00298 ioc->fds[x].events); 00299 } 00300 ast_log(LOG_DEBUG, "================================================\n"); 00301 } |
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Removes an IO context.
Definition at line 218 of file io.c. References ast_log(), io_context::current_ioc, pollfd::events, io_context::fdcnt, io_context::fds, free, io_rec::id, io_context::ior, LOG_NOTICE, LOG_WARNING, io_context::needshrink, and pollfd::revents. Referenced by ast_io_wait(), and ast_rtp_destroy().
00219 { 00220 int x; 00221 if (!_id) { 00222 ast_log(LOG_WARNING, "Asked to remove NULL?\n"); 00223 return -1; 00224 } 00225 for (x=0;x<ioc->fdcnt;x++) { 00226 if (ioc->ior[x].id == _id) { 00227 /* Free the int immediately and set to NULL so we know it's unused now */ 00228 free(ioc->ior[x].id); 00229 ioc->ior[x].id = NULL; 00230 ioc->fds[x].events = 0; 00231 ioc->fds[x].revents = 0; 00232 ioc->needshrink = 1; 00233 if (!ioc->current_ioc) 00234 io_shrink(ioc); 00235 return 0; 00236 } 00237 } 00238 00239 ast_log(LOG_NOTICE, "Unable to remove unknown id %p\n", _id); 00240 return -1; 00241 } |
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Waits for IO.
Definition at line 243 of file io.c. References ast_io_remove(), ast_log(), io_rec::callback, io_context::current_ioc, io_rec::data, DEBUG, pollfd::fd, io_context::fdcnt, io_context::fds, io_rec::id, io_context::ior, LOG_DEBUG, io_context::needshrink, poll(), and pollfd::revents.
00244 { 00245 /* 00246 * Make the poll call, and call 00247 * the callbacks for anything that needs 00248 * to be handled 00249 */ 00250 int res; 00251 int x; 00252 int origcnt; 00253 DEBUG(ast_log(LOG_DEBUG, "ast_io_wait()\n")); 00254 res = poll(ioc->fds, ioc->fdcnt, howlong); 00255 if (res > 0) { 00256 /* 00257 * At least one event 00258 */ 00259 origcnt = ioc->fdcnt; 00260 for(x=0;x<origcnt;x++) { 00261 /* Yes, it is possible for an entry to be deleted and still have an 00262 event waiting if it occurs after the original calling id */ 00263 if (ioc->fds[x].revents && ioc->ior[x].id) { 00264 /* There's an event waiting */ 00265 ioc->current_ioc = *ioc->ior[x].id; 00266 if (ioc->ior[x].callback) { 00267 if (!ioc->ior[x].callback(ioc->ior[x].id, ioc->fds[x].fd, ioc->fds[x].revents, ioc->ior[x].data)) { 00268 /* Time to delete them since they returned a 0 */ 00269 ast_io_remove(ioc, ioc->ior[x].id); 00270 } 00271 } 00272 ioc->current_ioc = -1; 00273 } 00274 } 00275 if (ioc->needshrink) 00276 io_shrink(ioc); 00277 } 00278 return res; 00279 } |
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Restores TTY mode.
Definition at line 324 of file io.c.
00325 { 00326 int res; 00327 struct termios tios; 00328 if (oldstate < 0) 00329 return 0; 00330 res = tcgetattr(fd, &tios); 00331 if (res < 0) 00332 return -1; 00333 tios.c_lflag &= ~(ECHO | ECHONL); 00334 tios.c_lflag |= oldstate; 00335 res = tcsetattr(fd, TCSAFLUSH, &tios); 00336 if (res < 0) 00337 return -1; 00338 return 0; 00339 } |
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Creates a context. Create a context for I/O operations Basically mallocs an IO structure and sets up some default values. Returns an allocated io_context structure Definition at line 65 of file io.c. References free, GROW_SHRINK_SIZE, and malloc.
00066 { 00067 /* Create an I/O context */ 00068 struct io_context *tmp; 00069 tmp = malloc(sizeof(struct io_context)); 00070 if (tmp) { 00071 tmp->needshrink = 0; 00072 tmp->fdcnt = 0; 00073 tmp->maxfdcnt = GROW_SHRINK_SIZE/2; 00074 tmp->current_ioc = -1; 00075 tmp->fds = malloc((GROW_SHRINK_SIZE/2) * sizeof(struct pollfd)); 00076 if (!tmp->fds) { 00077 free(tmp); 00078 tmp = NULL; 00079 } else { 00080 memset(tmp->fds, 0, (GROW_SHRINK_SIZE/2) * sizeof(struct pollfd)); 00081 tmp->ior = malloc((GROW_SHRINK_SIZE/2) * sizeof(struct io_rec)); 00082 if (!tmp->ior) { 00083 free(tmp->fds); 00084 free(tmp); 00085 tmp = NULL; 00086 } else 00087 memset(tmp->ior, 0, (GROW_SHRINK_SIZE/2) * sizeof(struct io_rec)); 00088 } 00089 } 00090 return tmp; 00091 } |
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Destroys a context.
Definition at line 93 of file io.c. References io_context::fds, free, and io_context::ior.
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