| 1 |
578 |
markom |
/*
|
| 2 |
|
|
* (c) Copyright 1990-1996 OPEN SOFTWARE FOUNDATION, INC.
|
| 3 |
|
|
* (c) Copyright 1990-1996 HEWLETT-PACKARD COMPANY
|
| 4 |
|
|
* (c) Copyright 1990-1996 DIGITAL EQUIPMENT CORPORATION
|
| 5 |
|
|
* (c) Copyright 1991, 1992 Siemens-Nixdorf Information Systems
|
| 6 |
|
|
* To anyone who acknowledges that this file is provided "AS IS" without
|
| 7 |
|
|
* any express or implied warranty: permission to use, copy, modify, and
|
| 8 |
|
|
* distribute this file for any purpose is hereby granted without fee,
|
| 9 |
|
|
* provided that the above copyright notices and this notice appears in
|
| 10 |
|
|
* all source code copies, and that none of the names listed above be used
|
| 11 |
|
|
* in advertising or publicity pertaining to distribution of the software
|
| 12 |
|
|
* without specific, written prior permission. None of these organizations
|
| 13 |
|
|
* makes any representations about the suitability of this software for
|
| 14 |
|
|
* any purpose.
|
| 15 |
|
|
*/
|
| 16 |
|
|
/*
|
| 17 |
|
|
* Header file for thread synchrounous I/O
|
| 18 |
|
|
*/
|
| 19 |
|
|
|
| 20 |
|
|
#ifndef CMA_THREAD_IO
|
| 21 |
|
|
#define CMA_THREAD_IO
|
| 22 |
|
|
|
| 23 |
|
|
/*
|
| 24 |
|
|
* INCLUDE FILES
|
| 25 |
|
|
*/
|
| 26 |
|
|
|
| 27 |
|
|
#include <cma_config.h>
|
| 28 |
|
|
#include <sys/file.h>
|
| 29 |
|
|
#include <cma.h>
|
| 30 |
|
|
#include <sys/types.h>
|
| 31 |
|
|
#include <sys/time.h>
|
| 32 |
|
|
#include <cma_init.h>
|
| 33 |
|
|
#include <cma_errors.h>
|
| 34 |
|
|
|
| 35 |
|
|
/*
|
| 36 |
|
|
* CONSTANTS
|
| 37 |
|
|
*/
|
| 38 |
|
|
|
| 39 |
|
|
/*
|
| 40 |
|
|
* Define symbols which indicate whether to compile code for obsolete
|
| 41 |
|
|
* "non-blocking mode" flags: FNDELAY and FNBLOCK. If the obsolete
|
| 42 |
|
|
* symbols are defined, and if their replacement symbols are defined
|
| 43 |
|
|
* and are different or if they are undefined, then define a symbol
|
| 44 |
|
|
* that says to compile the code in; otherwise no code will be compiled
|
| 45 |
|
|
* for these obsolete symbols.
|
| 46 |
|
|
*/
|
| 47 |
|
|
#ifdef FNDELAY
|
| 48 |
|
|
# ifdef O_NDELAY
|
| 49 |
|
|
# if O_NDELAY != FNDELAY
|
| 50 |
|
|
# define _CMA_FNDELAY_
|
| 51 |
|
|
# endif
|
| 52 |
|
|
# else
|
| 53 |
|
|
# define _CMA_FNDELAY_
|
| 54 |
|
|
# endif
|
| 55 |
|
|
#endif
|
| 56 |
|
|
|
| 57 |
|
|
#ifdef FNBLOCK
|
| 58 |
|
|
# ifdef O_NONBLOCK
|
| 59 |
|
|
# if O_NONBLOCK != FNBLOCK
|
| 60 |
|
|
# define _CMA_FNBLOCK_
|
| 61 |
|
|
# endif
|
| 62 |
|
|
# else
|
| 63 |
|
|
# define _CMA_FNBLOCK_
|
| 64 |
|
|
# endif
|
| 65 |
|
|
#endif
|
| 66 |
|
|
|
| 67 |
|
|
|
| 68 |
|
|
extern cma_t_boolean cma_is_open(int);
|
| 69 |
|
|
/*
|
| 70 |
|
|
* Maximum number of files (ie, max_fd+1)
|
| 71 |
|
|
*/
|
| 72 |
|
|
#define cma__c_mx_file FD_SETSIZE
|
| 73 |
|
|
|
| 74 |
|
|
/*
|
| 75 |
|
|
* Number of bits per file descriptor bit mask (ie number of bytes * bits/byte)
|
| 76 |
|
|
*/
|
| 77 |
|
|
#define cma__c_nbpm NFDBITS
|
| 78 |
|
|
|
| 79 |
|
|
/*
|
| 80 |
|
|
* TYPE DEFINITIONS
|
| 81 |
|
|
*/
|
| 82 |
|
|
|
| 83 |
|
|
typedef enum CMA__T_IO_TYPE {
|
| 84 |
|
|
cma__c_io_read = 0,
|
| 85 |
|
|
cma__c_io_write = 1,
|
| 86 |
|
|
cma__c_io_except = 2
|
| 87 |
|
|
} cma__t_io_type;
|
| 88 |
|
|
#define cma__c_max_io_type 2
|
| 89 |
|
|
|
| 90 |
|
|
/*
|
| 91 |
|
|
* From our local <sys/types.h>:
|
| 92 |
|
|
*
|
| 93 |
|
|
* typedef long fd_mask;
|
| 94 |
|
|
*
|
| 95 |
|
|
* typedef struct fd_set {
|
| 96 |
|
|
* fd_mask fds_bits[howmany(FD_SETSIZE, NFDBITS)];
|
| 97 |
|
|
* } fd_set;
|
| 98 |
|
|
*
|
| 99 |
|
|
*/
|
| 100 |
|
|
typedef fd_mask cma__t_mask;
|
| 101 |
|
|
typedef fd_set cma__t_file_mask;
|
| 102 |
|
|
|
| 103 |
|
|
|
| 104 |
|
|
/*
|
| 105 |
|
|
* GLOBAL DATA
|
| 106 |
|
|
*/
|
| 107 |
|
|
|
| 108 |
|
|
/*
|
| 109 |
|
|
* Maximum number of files (ie, max_fd+1) as determined by getdtablesize().
|
| 110 |
|
|
*/
|
| 111 |
|
|
extern int cma__g_mx_file;
|
| 112 |
|
|
|
| 113 |
|
|
/*
|
| 114 |
|
|
* Number of submasks (ie "int" sized chunks) per file descriptor mask as
|
| 115 |
|
|
* determined by getdtablesize().
|
| 116 |
|
|
*/
|
| 117 |
|
|
extern int cma__g_nspm;
|
| 118 |
|
|
|
| 119 |
|
|
/*
|
| 120 |
|
|
* MACROS
|
| 121 |
|
|
*/
|
| 122 |
|
|
|
| 123 |
|
|
/*
|
| 124 |
|
|
* Define a constant for the errno value which indicates that the requested
|
| 125 |
|
|
* operation was not performed because it would block the process.
|
| 126 |
|
|
*/
|
| 127 |
|
|
# define cma__is_blocking(s) \
|
| 128 |
|
|
((s == EAGAIN) || (s == EWOULDBLOCK) || (s == EINPROGRESS) || \
|
| 129 |
|
|
(s == EALREADY) || (s == EDEADLK))
|
| 130 |
|
|
|
| 131 |
|
|
/*
|
| 132 |
|
|
* It is necessary to issue an I/O function, before calling cma__io_wait()
|
| 133 |
|
|
* in the following cases:
|
| 134 |
|
|
*
|
| 135 |
|
|
* * This file descriptor has been set non-blocking by CMA
|
| 136 |
|
|
* * This file descriptor has been set non-blocking by the user.
|
| 137 |
|
|
*/
|
| 138 |
|
|
|
| 139 |
|
|
#define cma__issue_io_call(fd) \
|
| 140 |
|
|
( (cma__g_file[fd]->non_blocking) || \
|
| 141 |
|
|
(cma__g_file[fd]->user_fl.user_non_blocking) )
|
| 142 |
|
|
|
| 143 |
|
|
|
| 144 |
|
|
#define cma__set_user_nonblocking(flags) \
|
| 145 |
|
|
|
| 146 |
|
|
/*
|
| 147 |
|
|
* Determine if the file is open
|
| 148 |
|
|
*/
|
| 149 |
|
|
/*
|
| 150 |
|
|
* If the file gets closed while waiting for the mutex cma__g_file[rfd]
|
| 151 |
|
|
* gets set to null. This results in a crash if NDEBUG is set to 0
|
| 152 |
|
|
* since cma__int_lock tries to dereference it to set the mutex ownership
|
| 153 |
|
|
* after it gets the mutex. The following will still set the ownership
|
| 154 |
|
|
* in cma__int_lock so we'll set it back to noone if cma__g_file is null
|
| 155 |
|
|
* when we come back just in case it matters. It shouldn't since its no
|
| 156 |
|
|
* longer in use but.....
|
| 157 |
|
|
* Callers of this should recheck cma__g_file after the reservation to
|
| 158 |
|
|
* make sure continueing makes sense.
|
| 159 |
|
|
*/
|
| 160 |
|
|
#define cma__fd_reserve(rfd) \
|
| 161 |
|
|
{ \
|
| 162 |
|
|
cma__t_int_mutex *__mutex__; \
|
| 163 |
|
|
__mutex__ = cma__g_file[rfd]->mutex; \
|
| 164 |
|
|
cma__int_lock (__mutex__); \
|
| 165 |
|
|
if(cma__g_file[rfd] == (cma__t_file_obj *)cma_c_null_ptr) \
|
| 166 |
|
|
cma__int_unlock(__mutex__); \
|
| 167 |
|
|
}
|
| 168 |
|
|
|
| 169 |
|
|
|
| 170 |
|
|
/*
|
| 171 |
|
|
* Unreserve a file descriptor
|
| 172 |
|
|
*/
|
| 173 |
|
|
#define cma__fd_unreserve(ufd) cma__int_unlock (cma__g_file[ufd]->mutex)
|
| 174 |
|
|
|
| 175 |
|
|
/*
|
| 176 |
|
|
* AND together two select file descriptor masks
|
| 177 |
|
|
*/
|
| 178 |
|
|
#define cma__fdm_and(target,a,b) \
|
| 179 |
|
|
{ \
|
| 180 |
|
|
int __i__ = cma__g_nspm; \
|
| 181 |
|
|
while (__i__--) \
|
| 182 |
|
|
(target)->fds_bits[__i__] = \
|
| 183 |
|
|
(a)->fds_bits[__i__] & (b)->fds_bits[__i__]; \
|
| 184 |
|
|
}
|
| 185 |
|
|
|
| 186 |
|
|
/*
|
| 187 |
|
|
* Clear a bit in a select file descriptor mask
|
| 188 |
|
|
*
|
| 189 |
|
|
* FD_CLR(n, p) := ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
|
| 190 |
|
|
*/
|
| 191 |
|
|
#define cma__fdm_clr_bit(n,p) FD_CLR (n, p)
|
| 192 |
|
|
|
| 193 |
|
|
/*
|
| 194 |
|
|
* Copy the contents of one file descriptor mask into another. If the
|
| 195 |
|
|
* destination operand is null, do nothing; if the source operand is null,
|
| 196 |
|
|
* simply zero the destination.
|
| 197 |
|
|
*/
|
| 198 |
|
|
#define cma__fdm_copy(src,dst,nfds) { \
|
| 199 |
|
|
if (dst) \
|
| 200 |
|
|
if (src) { \
|
| 201 |
|
|
cma__t_mask *__s__ = (cma__t_mask *)(src); \
|
| 202 |
|
|
cma__t_mask *__d__ = (cma__t_mask *)(dst); \
|
| 203 |
|
|
int __i__; \
|
| 204 |
|
|
for (__i__ = 0; __i__ < (nfds); __i__ += cma__c_nbpm) \
|
| 205 |
|
|
*__d__++ = *__s__++; \
|
| 206 |
|
|
} \
|
| 207 |
|
|
else \
|
| 208 |
|
|
cma__fdm_zero (dst); \
|
| 209 |
|
|
}
|
| 210 |
|
|
|
| 211 |
|
|
/*
|
| 212 |
|
|
* To increment count for each bit set in fd - mask
|
| 213 |
|
|
*/
|
| 214 |
|
|
#define cma__fdm_count_bits(map,count) \
|
| 215 |
|
|
{ \
|
| 216 |
|
|
int __i__ = cma__g_nspm; \
|
| 217 |
|
|
while (__i__--) { \
|
| 218 |
|
|
cma__t_mask __tm__; \
|
| 219 |
|
|
__tm__ = (map)->fds_bits[__i__]; \
|
| 220 |
|
|
while(__tm__) { \
|
| 221 |
|
|
(count)++; \
|
| 222 |
|
|
__tm__ &= ~(__tm__ & (-__tm__)); /* Assumes 2's comp */ \
|
| 223 |
|
|
} \
|
| 224 |
|
|
} \
|
| 225 |
|
|
}
|
| 226 |
|
|
|
| 227 |
|
|
/*
|
| 228 |
|
|
* Test if a bit is set in a select file descriptor mask
|
| 229 |
|
|
*
|
| 230 |
|
|
* FD_ISSET(n,p) := ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
|
| 231 |
|
|
*/
|
| 232 |
|
|
#define cma__fdm_is_set(n,p) FD_ISSET (n, p)
|
| 233 |
|
|
|
| 234 |
|
|
/*
|
| 235 |
|
|
* OR together two select file descriptor masks
|
| 236 |
|
|
*/
|
| 237 |
|
|
#define cma__fdm_or(target,a,b) \
|
| 238 |
|
|
{ \
|
| 239 |
|
|
int __i__ = cma__g_nspm; \
|
| 240 |
|
|
while (__i__--) \
|
| 241 |
|
|
(target)->fds_bits[__i__] = \
|
| 242 |
|
|
(a)->fds_bits[__i__] | (b)->fds_bits[__i__]; \
|
| 243 |
|
|
}
|
| 244 |
|
|
|
| 245 |
|
|
/*
|
| 246 |
|
|
* Set a bit in a select file descriptor mask
|
| 247 |
|
|
*
|
| 248 |
|
|
* FD_SET(n,p) := ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
|
| 249 |
|
|
*/
|
| 250 |
|
|
#define cma__fdm_set_bit(n,p) FD_SET (n, p)
|
| 251 |
|
|
|
| 252 |
|
|
/*
|
| 253 |
|
|
* Clear a select file descriptor mask.
|
| 254 |
|
|
*/
|
| 255 |
|
|
#define cma__fdm_zero(n) \
|
| 256 |
|
|
cma__memset ((char *) n, 0, cma__g_nspm * sizeof(cma__t_mask))
|
| 257 |
|
|
|
| 258 |
|
|
|
| 259 |
|
|
|
| 260 |
|
|
/*
|
| 261 |
|
|
* CMA "thread-synchronous" I/O read/write operations
|
| 262 |
|
|
*/
|
| 263 |
|
|
|
| 264 |
|
|
/*
|
| 265 |
|
|
* Since all CMA "thread-synchronous" I/O (read or write) operations on
|
| 266 |
|
|
* U*ix follow the exact same structure, the wrapper routines have been
|
| 267 |
|
|
* condensed into a macro.
|
| 268 |
|
|
*
|
| 269 |
|
|
* The steps performed are as follows:
|
| 270 |
|
|
* 1. Check that the file descriptor is a legitimate value.
|
| 271 |
|
|
* 2. Check that the entry in the CMA file "database" which corresponds to
|
| 272 |
|
|
* the file descriptor indicates that the "file" was "opened" by CMA.
|
| 273 |
|
|
* 3. Reserve the file, to serialized access to files. This not only
|
| 274 |
|
|
* simplifies things, but also defends against non-reentrancy.
|
| 275 |
|
|
* 4. If the "file" is "set" for non-blocking I/O, check if we
|
| 276 |
|
|
* have actually set the file non-blocking yet, and if not do so.
|
| 277 |
|
|
* Then, issue the I/O operantion.
|
| 278 |
|
|
* Success or failure is returned immediately, after unreserving the
|
| 279 |
|
|
* file. If the error indicates that the operation would have caused
|
| 280 |
|
|
* the process to block, continue to the next step.
|
| 281 |
|
|
* 5. The I/O prolog adds this "file" to the global bit mask, which
|
| 282 |
|
|
* represents all "files" which have threads waiting to perform I/O on
|
| 283 |
|
|
* them, and causes the thread to block on the condition variable for
|
| 284 |
|
|
* this "file". Periodically, a select is done on this global bit
|
| 285 |
|
|
* mask, and the condition variables corresponding to "files" which
|
| 286 |
|
|
* are ready for I/O are signaled, releasing those waiting threads to
|
| 287 |
|
|
* perform their I/O.
|
| 288 |
|
|
* 6. When the thread returns from the I/O prolog, it can (hopefully)
|
| 289 |
|
|
* perform its operation without blocking the process.
|
| 290 |
|
|
* 7. The I/O epilog clears the bit in the global mask and/or signals the
|
| 291 |
|
|
* the next thread waiting for this "file", as appropriate.
|
| 292 |
|
|
* 8. If the I/O failed, continue to loop.
|
| 293 |
|
|
* 9. Finally, the "file" is unreserved, as we're done with it, and the
|
| 294 |
|
|
* result of the operation is returned.
|
| 295 |
|
|
*
|
| 296 |
|
|
*
|
| 297 |
|
|
* Note: currently, we believe that timeslicing which is based on the
|
| 298 |
|
|
* virtual-time timer does not cause system calls to return EINTR.
|
| 299 |
|
|
* Threfore, any EINTR returns are relayed directly to the caller.
|
| 300 |
|
|
* On platforms which do not support a virtual-time timer, the code
|
| 301 |
|
|
* should probably catch EINTR returns and restart the system call.
|
| 302 |
|
|
*/
|
| 303 |
|
|
|
| 304 |
|
|
/*
|
| 305 |
|
|
* This macro is used for both read-type and write-type functions.
|
| 306 |
|
|
*
|
| 307 |
|
|
* Note: the second call to "func" may require being bracketed in a
|
| 308 |
|
|
* cma__interrupt_disable/cma__interrupt_enable pair, but we'll
|
| 309 |
|
|
* wait and see if this is necessary.
|
| 310 |
|
|
*/
|
| 311 |
|
|
#define cma__ts_func(func,fd,arglist,type,post_process) { \
|
| 312 |
|
|
cma_t_integer __res__; \
|
| 313 |
|
|
cma_t_boolean __done__ = cma_c_false; \
|
| 314 |
|
|
if ((fd < 0) || (fd >= cma__g_mx_file)) return (cma__set_errno (EBADF), -1); \
|
| 315 |
|
|
if (!cma__is_open(fd)) return (cma__set_errno (EBADF), -1); \
|
| 316 |
|
|
cma__fd_reserve (fd); \
|
| 317 |
|
|
if (!cma__is_open(fd)) return (cma__set_errno (EBADF), -1); \
|
| 318 |
|
|
if (cma__issue_io_call(fd)) {\
|
| 319 |
|
|
if ((!cma__g_file[fd]->set_non_blocking) && \
|
| 320 |
|
|
(cma__g_file[fd]->non_blocking == cma_c_true)) \
|
| 321 |
|
|
cma__set_nonblocking(fd); \
|
| 322 |
|
|
cma__interrupt_disable (0); \
|
| 323 |
|
|
TRY { \
|
| 324 |
|
|
__res__ = func arglist; \
|
| 325 |
|
|
} \
|
| 326 |
|
|
CATCH_ALL { \
|
| 327 |
|
|
cma__interrupt_enable (0); \
|
| 328 |
|
|
cma__fd_unreserve (fd); \
|
| 329 |
|
|
RERAISE; \
|
| 330 |
|
|
} \
|
| 331 |
|
|
ENDTRY \
|
| 332 |
|
|
cma__interrupt_enable (0); \
|
| 333 |
|
|
if ((__res__ != -1) \
|
| 334 |
|
|
|| (!cma__is_blocking (errno)) \
|
| 335 |
|
|
|| (cma__g_file[fd]->user_fl.user_non_blocking)) \
|
| 336 |
|
|
__done__ = cma_c_true; \
|
| 337 |
|
|
} \
|
| 338 |
|
|
if (__done__) { \
|
| 339 |
|
|
cma__fd_unreserve (fd); \
|
| 340 |
|
|
} \
|
| 341 |
|
|
else { \
|
| 342 |
|
|
TRY { \
|
| 343 |
|
|
cma__io_prolog (type, fd); \
|
| 344 |
|
|
while (!__done__) { \
|
| 345 |
|
|
cma__io_wait (type, fd); \
|
| 346 |
|
|
__res__ = func arglist; \
|
| 347 |
|
|
if ((__res__ != -1) \
|
| 348 |
|
|
|| (!cma__is_blocking (errno)) \
|
| 349 |
|
|
|| (cma__g_file[fd]->user_fl.user_non_blocking)) \
|
| 350 |
|
|
__done__ = cma_c_true; \
|
| 351 |
|
|
} \
|
| 352 |
|
|
} \
|
| 353 |
|
|
FINALLY { \
|
| 354 |
|
|
cma__io_epilog (type, fd); \
|
| 355 |
|
|
cma__fd_unreserve (fd); \
|
| 356 |
|
|
} \
|
| 357 |
|
|
ENDTRY \
|
| 358 |
|
|
} \
|
| 359 |
|
|
if (__res__ != -1) post_process; \
|
| 360 |
|
|
return __res__; \
|
| 361 |
|
|
}
|
| 362 |
|
|
|
| 363 |
|
|
/*
|
| 364 |
|
|
* Since most CMA "thread-synchronous" I/O ("open"-type) operations on
|
| 365 |
|
|
* U*ix follow the exact same structure, the wrapper routines have been
|
| 366 |
|
|
* condensed into a macro.
|
| 367 |
|
|
*
|
| 368 |
|
|
* The steps performed are as follows:
|
| 369 |
|
|
* 1. Issue the open function.
|
| 370 |
|
|
* 2. If the value returned indicates an error, return it to the caller.
|
| 371 |
|
|
* 3. If the file descriptor returned is larger than what we think is the
|
| 372 |
|
|
* maximum value (ie if it is too big for our database) then bugcheck.
|
| 373 |
|
|
* 4. "Open" the "file" in the CMA file database.
|
| 374 |
|
|
* 5. Return the file descriptor value to the caller.
|
| 375 |
|
|
*
|
| 376 |
|
|
* FIX-ME: for the time being, if the I/O operation returns EINTR, we
|
| 377 |
|
|
* simply return it to the caller; eventually, we should catch this
|
| 378 |
|
|
* and "do the right thing" (if we can figure out what that is).
|
| 379 |
|
|
*/
|
| 380 |
|
|
|
| 381 |
|
|
/*
|
| 382 |
|
|
* This macro is used for all "open"-type functions which return a single file
|
| 383 |
|
|
* desciptor by immediate value.
|
| 384 |
|
|
*/
|
| 385 |
|
|
#define cma__ts_open(func,arglist,post_process) { \
|
| 386 |
|
|
int __fd__; \
|
| 387 |
|
|
TRY { \
|
| 388 |
|
|
cma__int_init (); \
|
| 389 |
|
|
cma__int_lock (cma__g_io_data_mutex); \
|
| 390 |
|
|
__fd__ = func arglist; \
|
| 391 |
|
|
cma__int_unlock (cma__g_io_data_mutex); \
|
| 392 |
|
|
if (__fd__ >= 0 && __fd__ < cma__g_mx_file) \
|
| 393 |
|
|
post_process; \
|
| 394 |
|
|
} \
|
| 395 |
|
|
CATCH_ALL \
|
| 396 |
|
|
{ \
|
| 397 |
|
|
cma__set_errno (EBADF); \
|
| 398 |
|
|
__fd__ = -1; \
|
| 399 |
|
|
} \
|
| 400 |
|
|
ENDTRY \
|
| 401 |
|
|
if (__fd__ >= cma__g_mx_file) \
|
| 402 |
|
|
cma__bugcheck ("cma__ts_open: fd is too large"); \
|
| 403 |
|
|
return __fd__; \
|
| 404 |
|
|
}
|
| 405 |
|
|
/*
|
| 406 |
|
|
* This macro is used for all "open"-type functions which return a pair of file
|
| 407 |
|
|
* desciptors by reference parameter.
|
| 408 |
|
|
*/
|
| 409 |
|
|
#define cma__ts_open2(func,fdpair,arglist,post_process) { \
|
| 410 |
|
|
int __res__; \
|
| 411 |
|
|
TRY { \
|
| 412 |
|
|
cma__int_init (); \
|
| 413 |
|
|
cma__int_lock (cma__g_io_data_mutex); \
|
| 414 |
|
|
__res__ = func arglist; \
|
| 415 |
|
|
cma__int_unlock (cma__g_io_data_mutex); \
|
| 416 |
|
|
if (__res__ >= 0 && fdpair[0] < cma__g_mx_file \
|
| 417 |
|
|
&& fdpair[1] < cma__g_mx_file) \
|
| 418 |
|
|
post_process; \
|
| 419 |
|
|
} \
|
| 420 |
|
|
CATCH_ALL \
|
| 421 |
|
|
{ \
|
| 422 |
|
|
cma__set_errno (EBADF); \
|
| 423 |
|
|
__res__ = -1; \
|
| 424 |
|
|
} \
|
| 425 |
|
|
ENDTRY \
|
| 426 |
|
|
if ((fdpair[0] >= cma__g_mx_file) || (fdpair[1] >= cma__g_mx_file)) \
|
| 427 |
|
|
cma__bugcheck ("cma__ts_open2: one of fd's is too large"); \
|
| 428 |
|
|
return __res__; \
|
| 429 |
|
|
}
|
| 430 |
|
|
|
| 431 |
|
|
/*
|
| 432 |
|
|
* INTERNAL INTERFACES
|
| 433 |
|
|
*/
|
| 434 |
|
|
extern void cma__close_general (int);
|
| 435 |
|
|
|
| 436 |
|
|
extern void cma__init_thread_io (void);
|
| 437 |
|
|
|
| 438 |
|
|
extern cma_t_boolean cma__io_available (cma__t_io_type,int,struct timeval *);
|
| 439 |
|
|
|
| 440 |
|
|
extern void cma__io_epilog (cma__t_io_type,int);
|
| 441 |
|
|
|
| 442 |
|
|
extern void cma__io_prolog (cma__t_io_type,int);
|
| 443 |
|
|
|
| 444 |
|
|
extern void cma__io_wait (cma__t_io_type,int);
|
| 445 |
|
|
|
| 446 |
|
|
extern void cma__open_general (int);
|
| 447 |
|
|
|
| 448 |
|
|
extern void cma__reinit_thread_io (int);
|
| 449 |
|
|
|
| 450 |
|
|
extern void cma__set_nonblocking (int);
|
| 451 |
|
|
|
| 452 |
|
|
extern void cma__set_user_nonblock_flags (int,int);
|
| 453 |
|
|
|
| 454 |
|
|
extern cma_t_boolean cma__is_open (int);
|
| 455 |
|
|
|
| 456 |
|
|
|
| 457 |
|
|
#endif
|
