1/* vi:set ts=8 sts=4 sw=4: 2 * 3 * VIM - Vi IMproved by Bram Moolenaar 4 * BeBox port Copyright 1997 by Olaf Seibert. 5 * 6 * Do ":help uganda" in Vim to read copying and usage conditions. 7 * Do ":help credits" in Vim to see a list of people who contributed. 8 * See README.txt for an overview of the Vim source code. 9 */ 10/* 11 * os_beos.c Additional stuff for BeOS (rest is in os_unix.c) 12 */ 13 14#include <float.h> 15#include <termios.h> 16#include <kernel/OS.h> 17#include "vim.h" 18 19#if USE_THREAD_FOR_INPUT_WITH_TIMEOUT 20 21#ifdef PROTO /* making prototypes on Unix */ 22#define sem_id int 23#define thread_id int 24#endif 25 26char_u charbuf; 27signed char charcount; 28sem_id character_present; 29sem_id character_wanted; 30thread_id read_thread_id; 31 32#define TRY_ABORT 0 /* This code does not work so turn it off. */ 33 34#if TRY_ABORT 35 static void 36mostly_ignore(int sig) 37{ 38} 39#endif 40 41 static long 42read_thread(void *dummy) 43{ 44 signal(SIGINT, SIG_IGN); 45 signal(SIGQUIT, SIG_IGN); 46#if TRY_ABORT 47 signal(SIGUSR1, mostly_ignore); 48#endif 49 50 for (;;) { 51 if (acquire_sem(character_wanted) != B_NO_ERROR) 52 break; 53 charcount = read(read_cmd_fd, &charbuf, 1); 54 release_sem(character_present); 55 } 56 57 return 0; 58} 59 60 void 61beos_cleanup_read_thread(void) 62{ 63 if (character_present > 0) 64 delete_sem(character_present); 65 character_present = 0; 66 if (read_thread_id > 0) 67 kill_thread(read_thread_id); 68 read_thread_id = 0; 69} 70 71#endif 72 73/* 74 * select() emulation. Hopefully, in DR9 there will be something 75 * useful supplied by the system. ... Alas, not. Not in AAPR, nor 76 * in PR or even PR2... R3 then maybe? I don't think so! 77 */ 78 79 int 80beos_select(int nbits, 81 struct fd_set *rbits, 82 struct fd_set *wbits, 83 struct fd_set *ebits, 84 struct timeval *timeout) 85{ 86 bigtime_t tmo; 87 88 if (nbits == 0) { 89 /* select is purely being used for delay */ 90 snooze(timeout->tv_sec * 1e6 + timeout->tv_usec); 91 return 0; 92 } 93#if 0 94 /* 95 * This does not seem to work either. Reads here are not supposed to 96 * block indefinitely, yet they do. This is most annoying. 97 */ 98 if (FD_ISSET(0, rbits)) { 99 char cbuf[1]; 100 int count; 101 struct termios told; 102 struct termios tnew; 103 tcgetattr(0, &told); 104 tnew = told; 105 tnew.c_lflag &= ~ICANON; 106 tnew.c_cc[VMIN] = 0; 107 tnew.c_cc[VTIME] = timeout->tv_sec * 10 + timeout->tv_usec / 100000; 108 tcsetattr(0, TCSANOW, &tnew); 109 110 count = read(0, &cbuf, sizeof(cbuf)); 111 tcsetattr(0, TCSANOW, &told); 112 if (count > 0) { 113 add_to_input_buf(&cbuf[0], count); 114 return 1; 115 } 116 return 0; 117 } 118#endif 119#if USE_THREAD_FOR_INPUT_WITH_TIMEOUT 120 /* 121 * Check if the operation is really on stdin... 122 */ 123 if (FD_ISSET(read_cmd_fd, rbits)) 124 { 125 int acquired; 126 127 /* 128 * Is this the first time through? 129 * Then start up the thread and initialise the semaphores. 130 */ 131 if (character_present == 0) { 132 character_present = create_sem(0, "vim character_present"); 133 character_wanted = create_sem(1, "vim character_wanted"); 134 read_thread_id = spawn_thread(read_thread, "vim async read", 135 B_NORMAL_PRIORITY, NULL); 136 atexit(beos_cleanup_read_thread); 137 resume_thread(read_thread_id); 138 } 139 140 /* timeout == NULL means "indefinitely" */ 141 if (timeout) { 142 tmo = timeout->tv_sec * 1e6 + timeout->tv_usec; 143 /* 0 means "don't wait, which is impossible to do exactly. */ 144 if (tmo == 0) 145 tmo = 1.0; 146 } 147#if TRY_ABORT 148 release_sem(character_wanted); 149#endif 150 if (timeout) 151 acquired = acquire_sem_etc(character_present, 1, B_TIMEOUT, tmo); 152 else 153 acquired = acquire_sem(character_present); 154 if (acquired == B_NO_ERROR) { 155 if (charcount > 0) { 156 add_to_input_buf(&charbuf, 1); 157#if !TRY_ABORT 158 release_sem(character_wanted); 159#endif 160 161 return 1; 162 } else { 163#if !TRY_ABORT 164 release_sem(character_wanted); 165#endif 166 167 return 0; 168 } 169 } 170#if TRY_ABORT 171 else { 172 /* 173 * Timeout occurred. Break the read() call by sending 174 * a signal. Problem: it may be just read()ing it now. 175 * Therefore we still have to finish the handshake with 176 * the thread and maybe remember the character. 177 */ 178 kill(read_thread_id, SIGUSR1); 179 /* 180 * If some other error occurred, don't hang now. 181 * (We will most likely hang later anyway...) 182 */ 183 if (acquired == B_TIMED_OUT) 184 acquire_sem(character_present); 185 if (charcount > 0) { 186 add_to_input_buf(&charbuf, 1); 187 return 1; 188 } 189 return 0; 190 } 191#endif 192 } 193#endif 194 195 return 0; 196} 197 198