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niceSOFT
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make
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4.4
src/os.h
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Paul Smith
Update URLs to use https rather than http
18 окт 2022, 21:37
18 окт 2022, 21:37
d9fc1ac
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/* Declarations for operating system interfaces for GNU Make. Copyright (C) 2016-2022 Free Software Foundation, Inc. This file is part of GNU Make. GNU Make is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>. */ #define IO_UNKNOWN 0x0001 #define IO_COMBINED_OUTERR 0x0002 #define IO_STDIN_OK 0x0004 #define IO_STDOUT_OK 0x0008 #define IO_STDERR_OK 0x0010 #if defined(VMS) || defined(_AMIGA) || defined(__MSDOS__) # define check_io_state() (IO_STDIN_OK|IO_STDOUT_OK|IO_STDERR_OK) # define fd_inherit(_i) (0) # define fd_noinherit(_i) (0) # define fd_set_append(_i) (void)(0) # define os_anontmp() (-1) #else /* Determine the state of stdin/stdout/stderr. */ unsigned int check_io_state (void); /* Set a file descriptor to close/not close in a subprocess. */ void fd_inherit (int); void fd_noinherit (int); /* If the file descriptor is for a file put it into append mode. */ void fd_set_append (int); /* Return a file descriptor for a new anonymous temp file, or -1. */ int os_anontmp (void); #endif /* This section provides OS-specific functions to support the jobserver. */ #ifdef MAKE_JOBSERVER /* Returns 1 if the jobserver is enabled, else 0. */ unsigned int jobserver_enabled (void); /* Called in the parent make to set up the jobserver initially. */ unsigned int jobserver_setup (int job_slots, const char *style); /* Called in a child instance to connect to the jobserver. Return 1 if we got a valid auth, else 0. */ unsigned int jobserver_parse_auth (const char* auth); /* Returns an allocated buffer used to pass to child instances. */ char *jobserver_get_auth (void); /* Returns a pointer to a static string used to indicate that the child cannot access the jobserver, or NULL if it always can. */ const char *jobserver_get_invalid_auth (void); /* Clear this instance's jobserver configuration. This method might be invoked from a signal handler. */ void jobserver_clear (void); /* Recover all the jobserver tokens and return the number we got. Will also run jobserver_clear() as a side-effect. */ unsigned int jobserver_acquire_all (void); /* Release a jobserver token. If it fails and is_fatal is 1, fatal. */ void jobserver_release (int is_fatal); /* Notify the jobserver that a child exited. */ void jobserver_signal (void); /* Get ready to start a non-recursive child. */ void jobserver_pre_child (int); /* Complete starting a non-recursive child. */ void jobserver_post_child (int); /* Set up to acquire a new token. */ void jobserver_pre_acquire (void); /* Wait until we can acquire a jobserver token. TIMEOUT is 1 if we have other jobs waiting for the load to go down; in this case we won't wait forever, so we can check the load. Returns 1 if we got a token, or 0 if we stopped waiting due to a child exiting or a timeout. */ unsigned int jobserver_acquire (int timeout); #else #define jobserver_enabled() (0) #define jobserver_setup(_slots, _style) (0) #define jobserver_parse_auth(_auth) (0) #define jobserver_get_auth() (NULL) #define jobserver_get_invalid_auth() (NULL) #define jobserver_clear() (void)(0) #define jobserver_release(_fatal) (void)(0) #define jobserver_acquire_all() (0) #define jobserver_signal() (void)(0) #define jobserver_pre_child(_r) (void)(0) #define jobserver_post_child(_r) (void)(0) #define jobserver_pre_acquire() (void)(0) #define jobserver_acquire(_tmout) (0) #endif /* MAKE_JOBSERVER */ #ifndef NO_OUTPUT_SYNC /* Returns 1 if output sync is enabled, else 0. */ unsigned int osync_enabled (void); /* Called in the parent make to set up output sync initially. */ void osync_setup (void); /* Returns an allocated buffer containing output sync info to pass to child instances, or NULL if not needed. */ char *osync_get_mutex (void); /* Called in a child instance to obtain info on the output sync mutex. Return 1 if we got a valid mutex, else 0. */ unsigned int osync_parse_mutex (const char *mutex); /* Clean up this instance's output sync facilities. This method might be invoked from a signal handler. */ void osync_clear (void); /* Acquire the output sync lock. This will wait until available. Returns 0 if there was an error getting the semaphore. */ unsigned int osync_acquire (void); /* Release the output sync lock. */ void osync_release (void); #else #define osync_enabled() (0) #define osync_setup() (void)(0) #define osync_get_mutex() (0) #define osync_parse_mutex(_s) (0) #define osync_clear() (void)(0) #define osync_acquire() (1) #define osync_release() (void)(0) #endif /* NO_OUTPUT_SYNC */ /* Create a "bad" file descriptor for stdin when parallel jobs are run. */ #if defined(VMS) || defined(WINDOWS32) || defined(_AMIGA) || defined(__MSDOS__) # define get_bad_stdin() (-1) #else int get_bad_stdin (void); #endif