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Diffstat (limited to 'src/os_beos.c')
| -rw-r--r-- | src/os_beos.c | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/src/os_beos.c b/src/os_beos.c new file mode 100644 index 0000000..ebb4488 --- /dev/null +++ b/src/os_beos.c @@ -0,0 +1,200 @@ +/* vi:set ts=8 sts=4 sw=4 noet: + * + * VIM - Vi IMproved by Bram Moolenaar + * BeBox port Copyright 1997 by Olaf Seibert. + * + * Do ":help uganda" in Vim to read copying and usage conditions. + * Do ":help credits" in Vim to see a list of people who contributed. + * See README.txt for an overview of the Vim source code. + */ +/* + * os_beos.c Additional stuff for BeOS (rest is in os_unix.c) + */ + +#include <float.h> +#include <termios.h> +#ifndef PROTO +# include <kernel/OS.h> +#endif + +#include "vim.h" + +#if USE_THREAD_FOR_INPUT_WITH_TIMEOUT + +#ifdef PROTO /* making prototypes on Unix */ +#define sem_id int +#define thread_id int +#endif + +char_u charbuf; +signed char charcount; +sem_id character_present; +sem_id character_wanted; +thread_id read_thread_id; + +#define TRY_ABORT 0 /* This code does not work so turn it off. */ + +#if TRY_ABORT + static void +mostly_ignore(int sig) +{ +} +#endif + + static long +read_thread(void *dummy) +{ + signal(SIGINT, SIG_IGN); + signal(SIGQUIT, SIG_IGN); +#if TRY_ABORT + signal(SIGUSR1, mostly_ignore); +#endif + + for (;;) { + if (acquire_sem(character_wanted) != B_NO_ERROR) + break; + charcount = read(read_cmd_fd, &charbuf, 1); + release_sem(character_present); + } + + return 0; +} + + void +beos_cleanup_read_thread(void) +{ + if (character_present > 0) + delete_sem(character_present); + character_present = 0; + if (read_thread_id > 0) + kill_thread(read_thread_id); + read_thread_id = 0; +} + +#endif + +/* + * select() emulation. Hopefully, in DR9 there will be something + * useful supplied by the system. ... Alas, not. Not in AAPR, nor + * in PR or even PR2... R3 then maybe? I don't think so! + */ + + int +beos_select(int nbits, + struct fd_set *rbits, + struct fd_set *wbits, + struct fd_set *ebits, + struct timeval *timeout) +{ + bigtime_t tmo; + + if (nbits == 0) { + /* select is purely being used for delay */ + snooze(timeout->tv_sec * 1e6 + timeout->tv_usec); + return 0; + } +#if 0 + /* + * This does not seem to work either. Reads here are not supposed to + * block indefinitely, yet they do. This is most annoying. + */ + if (FD_ISSET(0, rbits)) { + char cbuf[1]; + int count; + struct termios told; + struct termios tnew; + tcgetattr(0, &told); + tnew = told; + tnew.c_lflag &= ~ICANON; + tnew.c_cc[VMIN] = 0; + tnew.c_cc[VTIME] = timeout->tv_sec * 10 + timeout->tv_usec / 100000; + tcsetattr(0, TCSANOW, &tnew); + + count = read(0, &cbuf, sizeof(cbuf)); + tcsetattr(0, TCSANOW, &told); + if (count > 0) { + add_to_input_buf(&cbuf[0], count); + return 1; + } + return 0; + } +#endif +#if USE_THREAD_FOR_INPUT_WITH_TIMEOUT + /* + * Check if the operation is really on stdin... + */ + if (FD_ISSET(read_cmd_fd, rbits)) + { + int acquired; + + /* + * Is this the first time through? + * Then start up the thread and initialise the semaphores. + */ + if (character_present == 0) { + character_present = create_sem(0, "vim character_present"); + character_wanted = create_sem(1, "vim character_wanted"); + read_thread_id = spawn_thread(read_thread, "vim async read", + B_NORMAL_PRIORITY, NULL); + atexit(beos_cleanup_read_thread); + resume_thread(read_thread_id); + } + + /* timeout == NULL means "indefinitely" */ + if (timeout) { + tmo = timeout->tv_sec * 1e6 + timeout->tv_usec; + /* 0 means "don't wait, which is impossible to do exactly. */ + if (tmo == 0) + tmo = 1.0; + } +#if TRY_ABORT + release_sem(character_wanted); +#endif + if (timeout) + acquired = acquire_sem_etc(character_present, 1, B_TIMEOUT, tmo); + else + acquired = acquire_sem(character_present); + if (acquired == B_NO_ERROR) { + if (charcount > 0) { + add_to_input_buf(&charbuf, 1); +#if !TRY_ABORT + release_sem(character_wanted); +#endif + + return 1; + } else { +#if !TRY_ABORT + release_sem(character_wanted); +#endif + + return 0; + } + } +#if TRY_ABORT + else { + /* + * Timeout occurred. Break the read() call by sending + * a signal. Problem: it may be just read()ing it now. + * Therefore we still have to finish the handshake with + * the thread and maybe remember the character. + */ + kill(read_thread_id, SIGUSR1); + /* + * If some other error occurred, don't hang now. + * (We will most likely hang later anyway...) + */ + if (acquired == B_TIMED_OUT) + acquire_sem(character_present); + if (charcount > 0) { + add_to_input_buf(&charbuf, 1); + return 1; + } + return 0; + } +#endif + } +#endif + + return 0; +} + |