char *stasis_app_control_get_channel_var(struct stasis_app_control *control, const char *variable) { RAII_VAR(struct ast_str *, tmp, ast_str_create(32), ast_free); /* You may be tempted to lock the channel you're about to read from. You * would be wrong. Some dialplan functions put the channel into * autoservice, which deadlocks if the channel is already locked. * ast_str_retrieve_variable() does its own locking, and the dialplan * functions need to as well. We should be fine without the lock. */ if (!tmp) { return NULL; } if (variable[strlen(variable) - 1] == ')') { if (ast_func_read2(control->channel, variable, &tmp, 0)) { return NULL; } } else { if (!ast_str_retrieve_variable(&tmp, 0, control->channel, NULL, variable)) { return NULL; } } return ast_strdup(ast_str_buffer(tmp)); }
char *stasis_app_control_get_channel_var(struct stasis_app_control *control, const char *variable) { RAII_VAR(struct ast_str *, tmp, ast_str_create(32), ast_free); SCOPED_CHANNELLOCK(lockvar, control->channel); if (!tmp) { return NULL; } if (variable[strlen(variable) - 1] == ')') { if (ast_func_read2(control->channel, variable, &tmp, 0)) { return NULL; } } else { if (!ast_str_retrieve_variable(&tmp, 0, control->channel, NULL, variable)) { return NULL; } } return ast_strdup(ast_str_buffer(tmp)); }