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14bf57180f
Landlock Make hasn't been working well on AARCH64 systems. Let's do this over the right way, using our new build tools.
158 lines
5.4 KiB
C
158 lines
5.4 KiB
C
/* Declarations for operating system interfaces for GNU Make.
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Copyright (C) 2016-2023 Free Software Foundation, Inc.
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This file is part of GNU Make.
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GNU Make is free software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 3 of the License, or (at your option) any later
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version.
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GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program. If not, see <https://www.gnu.org/licenses/>. */
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#define IO_UNKNOWN 0x0001
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#define IO_COMBINED_OUTERR 0x0002
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#define IO_STDIN_OK 0x0004
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#define IO_STDOUT_OK 0x0008
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#define IO_STDERR_OK 0x0010
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#if defined(VMS) || defined(_AMIGA) || defined(__MSDOS__)
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# define check_io_state() (IO_STDIN_OK|IO_STDOUT_OK|IO_STDERR_OK)
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# define fd_inherit(_i) (0)
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# define fd_noinherit(_i) (0)
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# define fd_set_append(_i) (void)(0)
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# define os_anontmp() (-1)
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#else
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/* Determine the state of stdin/stdout/stderr. */
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unsigned int check_io_state (void);
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/* Set a file descriptor to close/not close in a subprocess. */
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void fd_inherit (int);
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void fd_noinherit (int);
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/* If the file descriptor is for a file put it into append mode. */
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void fd_set_append (int);
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/* Return a file descriptor for a new anonymous temp file, or -1. */
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int os_anontmp (void);
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#endif
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/* This section provides OS-specific functions to support the jobserver. */
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#ifdef MAKE_JOBSERVER
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/* Returns 1 if the jobserver is enabled, else 0. */
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unsigned int jobserver_enabled (void);
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/* Called in the parent make to set up the jobserver initially. */
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unsigned int jobserver_setup (int job_slots, const char *style);
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/* Called in a child instance to connect to the jobserver.
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Return 1 if we got a valid auth, else 0. */
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unsigned int jobserver_parse_auth (const char* auth);
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/* Returns an allocated buffer used to pass to child instances. */
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char *jobserver_get_auth (void);
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/* Returns a pointer to a static string used to indicate that the child
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cannot access the jobserver, or NULL if it always can. */
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const char *jobserver_get_invalid_auth (void);
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/* Clear this instance's jobserver configuration.
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This method might be invoked from a signal handler. */
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void jobserver_clear (void);
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/* Recover all the jobserver tokens and return the number we got.
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Will also run jobserver_clear() as a side-effect. */
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unsigned int jobserver_acquire_all (void);
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/* Release a jobserver token. If it fails and is_fatal is 1, fatal. */
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void jobserver_release (int is_fatal);
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/* Notify the jobserver that a child exited. */
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void jobserver_signal (void);
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/* Get ready to start a non-recursive child. */
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void jobserver_pre_child (int);
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/* Complete starting a non-recursive child. */
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void jobserver_post_child (int);
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/* Set up to acquire a new token. */
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void jobserver_pre_acquire (void);
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/* Wait until we can acquire a jobserver token.
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TIMEOUT is 1 if we have other jobs waiting for the load to go down;
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in this case we won't wait forever, so we can check the load.
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Returns 1 if we got a token, or 0 if we stopped waiting due to a child
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exiting or a timeout. */
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unsigned int jobserver_acquire (int timeout);
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#else
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#define jobserver_enabled() (0)
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#define jobserver_setup(_slots, _style) (0)
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#define jobserver_parse_auth(_auth) (0)
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#define jobserver_get_auth() (NULL)
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#define jobserver_get_invalid_auth() (NULL)
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#define jobserver_clear() (void)(0)
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#define jobserver_release(_fatal) (void)(0)
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#define jobserver_acquire_all() (0)
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#define jobserver_signal() (void)(0)
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#define jobserver_pre_child(_r) (void)(0)
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#define jobserver_post_child(_r) (void)(0)
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#define jobserver_pre_acquire() (void)(0)
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#define jobserver_acquire(_tmout) (0)
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#endif /* MAKE_JOBSERVER */
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#ifndef NO_OUTPUT_SYNC
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/* Returns 1 if output sync is enabled, else 0. */
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unsigned int osync_enabled (void);
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/* Called in the parent make to set up output sync initially. */
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void osync_setup (void);
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/* Returns an allocated buffer containing output sync info to pass to child
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instances, or NULL if not needed. */
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char *osync_get_mutex (void);
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/* Called in a child instance to obtain info on the output sync mutex.
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Return 1 if we got a valid mutex, else 0. */
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unsigned int osync_parse_mutex (const char *mutex);
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/* Clean up this instance's output sync facilities.
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This method might be invoked from a signal handler. */
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void osync_clear (void);
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/* Acquire the output sync lock. This will wait until available.
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Returns 0 if there was an error getting the semaphore. */
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unsigned int osync_acquire (void);
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/* Release the output sync lock. */
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void osync_release (void);
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#else
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#define osync_enabled() (0)
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#define osync_setup() (void)(0)
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#define osync_get_mutex() (0)
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#define osync_parse_mutex(_s) (0)
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#define osync_clear() (void)(0)
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#define osync_acquire() (1)
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#define osync_release() (void)(0)
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#endif /* NO_OUTPUT_SYNC */
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/* Create a "bad" file descriptor for stdin when parallel jobs are run. */
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#if defined(VMS) || defined(WINDOWS32) || defined(_AMIGA) || defined(__MSDOS__)
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# define get_bad_stdin() (-1)
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#else
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int get_bad_stdin (void);
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#endif
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