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posix: sysconf: add a "small" implementation option

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Previously, sysconf() was only available as a macro (i.e. the
"extra-small" option).

This has the advantage of being compile-time constant, and
optimized for both space and speed. One disadvantage is that
querying an `_SC_` value that was invalid or unsupported
would result in a compile error.

Provide a "small" implementation of sysconf() (via Kconfig
choice) as a normal addressable function.

Signed-off-by: Christopher Friedt <cfriedt@meta.com>
This commit is contained in:
Christopher Friedt 2024-03-06 13:41:16 -05:00 committed by Fabio Baltieri
parent e5573a6ee0
commit cdc36d090c
5 changed files with 585 additions and 138 deletions
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279
include/zephyr/posix/sys/sysconf.h Normal file
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@ -0,0 +1,279 @@
/*
* Copyright (c) 2024, Meta
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef ZEPHYR_INCLUDE_POSIX_SYS_SYSCONF_H_
#define ZEPHYR_INCLUDE_POSIX_SYS_SYSCONF_H_
#ifdef __cplusplus
extern "C" {
#endif
#ifdef CONFIG_POSIX_SYSCONF
enum {
_SC_ADVISORY_INFO,
_SC_ASYNCHRONOUS_IO,
_SC_BARRIERS,
_SC_CLOCK_SELECTION,
_SC_CPUTIME,
_SC_FSYNC,
_SC_IPV6,
_SC_JOB_CONTROL,
_SC_MAPPED_FILE,
_SC_MEMLOCK,
_SC_MEMLOCK_RANGE,
_SC_MEMORY_PROTECTION,
_SC_MESSAGE_PASSING,
_SC_MONOTONIC_CLOCK,
_SC_PRIORITIZED_IO,
_SC_PRIORITY_SCHEDULING,
_SC_RAW_SOCKETS,
_SC_RE_DUP_MAX,
_SC_READER_WRITER_LOCKS,
_SC_REALTIME_SIGNALS,
_SC_REGEXP,
_SC_SAVED_IDS,
_SC_SEMAPHORES,
_SC_SHARED_MEMORY_OBJECTS,
_SC_SHELL,
_SC_SPAWN,
_SC_SPIN_LOCKS,
_SC_SPORADIC_SERVER,
_SC_SS_REPL_MAX,
_SC_SYNCHRONIZED_IO,
_SC_THREAD_ATTR_STACKADDR,
_SC_THREAD_ATTR_STACKSIZE,
_SC_THREAD_CPUTIME,
_SC_THREAD_PRIO_INHERIT,
_SC_THREAD_PRIO_PROTECT,
_SC_THREAD_PRIORITY_SCHEDULING,
_SC_THREAD_PROCESS_SHARED,
_SC_THREAD_ROBUST_PRIO_INHERIT,
_SC_THREAD_ROBUST_PRIO_PROTECT,
_SC_THREAD_SAFE_FUNCTIONS,
_SC_THREAD_SPORADIC_SERVER,
_SC_THREADS,
_SC_TIMEOUTS,
_SC_TIMERS,
_SC_TRACE,
_SC_TRACE_EVENT_FILTER,
_SC_TRACE_EVENT_NAME_MAX,
_SC_TRACE_INHERIT,
_SC_TRACE_LOG,
_SC_TRACE_NAME_MAX,
_SC_TRACE_SYS_MAX,
_SC_TRACE_USER_EVENT_MAX,
_SC_TYPED_MEMORY_OBJECTS,
_SC_VERSION,
_SC_V7_ILP32_OFF32,
_SC_V7_ILP32_OFFBIG,
_SC_V7_LP64_OFF64,
_SC_V7_LPBIG_OFFBIG,
_SC_V6_ILP32_OFF32,
_SC_V6_ILP32_OFFBIG,
_SC_V6_LP64_OFF64,
_SC_V6_LPBIG_OFFBIG,
_SC_BC_BASE_MAX,
_SC_BC_DIM_MAX,
_SC_BC_SCALE_MAX,
_SC_BC_STRING_MAX,
_SC_2_C_BIND,
_SC_2_C_DEV,
_SC_2_CHAR_TERM,
_SC_COLL_WEIGHTS_MAX,
_SC_DELAYTIMER_MAX,
_SC_EXPR_NEST_MAX,
_SC_2_FORT_DEV,
_SC_2_FORT_RUN,
_SC_LINE_MAX,
_SC_2_LOCALEDEF,
_SC_2_PBS,
_SC_2_PBS_ACCOUNTING,
_SC_2_PBS_CHECKPOINT,
_SC_2_PBS_LOCATE,
_SC_2_PBS_MESSAGE,
_SC_2_PBS_TRACK,
_SC_2_SW_DEV,
_SC_2_UPE,
_SC_2_VERSION,
_SC_XOPEN_CRYPT,
_SC_XOPEN_ENH_I18N,
_SC_XOPEN_REALTIME,
_SC_XOPEN_REALTIME_THREADS,
_SC_XOPEN_SHM,
_SC_XOPEN_STREAMS,
_SC_XOPEN_UNIX,
_SC_XOPEN_UUCP,
_SC_XOPEN_VERSION,
_SC_CLK_TCK,
_SC_GETGR_R_SIZE_MAX,
_SC_GETPW_R_SIZE_MAX,
_SC_AIO_LISTIO_MAX,
_SC_AIO_MAX,
_SC_AIO_PRIO_DELTA_MAX,
_SC_ARG_MAX,
_SC_ATEXIT_MAX,
_SC_CHILD_MAX,
_SC_HOST_NAME_MAX,
_SC_IOV_MAX,
_SC_LOGIN_NAME_MAX,
_SC_NGROUPS_MAX,
_SC_MQ_OPEN_MAX,
_SC_MQ_PRIO_MAX,
_SC_OPEN_MAX,
_SC_PAGE_SIZE,
_SC_PAGESIZE,
_SC_THREAD_DESTRUCTOR_ITERATIONS,
_SC_THREAD_KEYS_MAX,
_SC_THREAD_STACK_MIN,
_SC_THREAD_THREADS_MAX,
_SC_RTSIG_MAX,
_SC_SEM_NSEMS_MAX,
_SC_SEM_VALUE_MAX,
_SC_SIGQUEUE_MAX,
_SC_STREAM_MAX,
_SC_SYMLOOP_MAX,
_SC_TIMER_MAX,
_SC_TTY_NAME_MAX,
_SC_TZNAME_MAX,
};
#ifdef CONFIG_POSIX_SYSCONF_IMPL_MACRO
#define __z_posix_sysconf_SC_ADVISORY_INFO _POSIX_ADVISORY_INFO
#define __z_posix_sysconf_SC_ASYNCHRONOUS_IO _POSIX_ASYNCHRONOUS_IO
#define __z_posix_sysconf_SC_BARRIERS _POSIX_BARRIERS
#define __z_posix_sysconf_SC_CLOCK_SELECTION _POSIX_CLOCK_SELECTION
#define __z_posix_sysconf_SC_CPUTIME _POSIX_CPUTIME
#define __z_posix_sysconf_SC_FSYNC _POSIX_FSYNC
#define __z_posix_sysconf_SC_IPV6 _POSIX_IPV6
#define __z_posix_sysconf_SC_JOB_CONTROL _POSIX_JOB_CONTROL
#define __z_posix_sysconf_SC_MAPPED_FILE _POSIX_MAPPED_FILES
#define __z_posix_sysconf_SC_MEMLOCK _POSIX_MEMLOCK
#define __z_posix_sysconf_SC_MEMLOCK_RANGE _POSIX_MEMLOCK_RANGE
#define __z_posix_sysconf_SC_MEMORY_PROTECTION _POSIX_MEMORY_PROTECTION
#define __z_posix_sysconf_SC_MESSAGE_PASSING _POSIX_MESSAGE_PASSING
#define __z_posix_sysconf_SC_MONOTONIC_CLOCK _POSIX_MONOTONIC_CLOCK
#define __z_posix_sysconf_SC_PRIORITIZED_IO _POSIX_PRIORITIZED_IO
#define __z_posix_sysconf_SC_PRIORITY_SCHEDULING _POSIX_PRIORITY_SCHEDULING
#define __z_posix_sysconf_SC_RAW_SOCKETS _POSIX_RAW_SOCKETS
#define __z_posix_sysconf_SC_RE_DUP_MAX _POSIX_RE_DUP_MAX
#define __z_posix_sysconf_SC_READER_WRITER_LOCKS _POSIX_READER_WRITER_LOCKS
#define __z_posix_sysconf_SC_REALTIME_SIGNALS _POSIX_REALTIME_SIGNALS
#define __z_posix_sysconf_SC_REGEXP _POSIX_REGEXP
#define __z_posix_sysconf_SC_SAVED_IDS _POSIX_SAVED_IDS
#define __z_posix_sysconf_SC_SEMAPHORES _POSIX_SEMAPHORES
#define __z_posix_sysconf_SC_SHARED_MEMORY_OBJECTS _POSIX_SHARED_MEMORY_OBJECTS
#define __z_posix_sysconf_SC_SHELL _POSIX_SHELL
#define __z_posix_sysconf_SC_SPAWN _POSIX_SPAWN
#define __z_posix_sysconf_SC_SPIN_LOCKS _POSIX_SPIN_LOCKS
#define __z_posix_sysconf_SC_SPORADIC_SERVER _POSIX_SPORADIC_SERVER
#define __z_posix_sysconf_SC_SS_REPL_MAX _POSIX_SS_REPL_MAX
#define __z_posix_sysconf_SC_SYNCHRONIZED_IO _POSIX_SYNCHRONIZED_IO
#define __z_posix_sysconf_SC_THREAD_ATTR_STACKADDR _POSIX_THREAD_ATTR_STACKADDR
#define __z_posix_sysconf_SC_THREAD_ATTR_STACKSIZE _POSIX_THREAD_ATTR_STACKSIZE
#define __z_posix_sysconf_SC_THREAD_CPUTIME _POSIX_THREAD_CPUTIME
#define __z_posix_sysconf_SC_THREAD_PRIO_INHERIT _POSIX_THREAD_PRIO_INHERIT
#define __z_posix_sysconf_SC_THREAD_PRIO_PROTECT _POSIX_THREAD_PRIO_PROTECT
#define __z_posix_sysconf_SC_THREAD_PRIORITY_SCHEDULING _POSIX_THREAD_PRIORITY_SCHEDULING
#define __z_posix_sysconf_SC_THREAD_PROCESS_SHARED _POSIX_THREAD_PROCESS_SHARED
#define __z_posix_sysconf_SC_THREAD_ROBUST_PRIO_INHERIT _POSIX_THREAD_ROBUST_PRIO_INHERIT
#define __z_posix_sysconf_SC_THREAD_ROBUST_PRIO_PROTECT _POSIX_THREAD_ROBUST_PRIO_PROTECT
#define __z_posix_sysconf_SC_THREAD_SAFE_FUNCTIONS _POSIX_THREAD_SAFE_FUNCTIONS
#define __z_posix_sysconf_SC_THREAD_SPORADIC_SERVER _POSIX_THREAD_SPORADIC_SERVER
#define __z_posix_sysconf_SC_THREADS _POSIX_THREADS
#define __z_posix_sysconf_SC_TIMEOUTS _POSIX_TIMEOUTS
#define __z_posix_sysconf_SC_TIMERS _POSIX_TIMERS
#define __z_posix_sysconf_SC_TRACE _POSIX_TRACE
#define __z_posix_sysconf_SC_TRACE_EVENT_FILTER _POSIX_TRACE_EVENT_FILTER
#define __z_posix_sysconf_SC_TRACE_EVENT_NAME_MAX _POSIX_TRACE_EVENT_NAME_MAX
#define __z_posix_sysconf_SC_TRACE_INHERIT _POSIX_TRACE_INHERIT
#define __z_posix_sysconf_SC_TRACE_LOG _POSIX_TRACE_LOG
#define __z_posix_sysconf_SC_TRACE_NAME_MAX _POSIX_TRACE_NAME_MAX
#define __z_posix_sysconf_SC_TRACE_SYS_MAX _POSIX_TRACE_SYS_MAX
#define __z_posix_sysconf_SC_TRACE_USER_EVENT_MAX _POSIX_TRACE_USER_EVENT_MAX
#define __z_posix_sysconf_SC_TYPED_MEMORY_OBJECTS _POSIX_TYPED_MEMORY_OBJECTS
#define __z_posix_sysconf_SC_VERSION _POSIX_VERSION
#define __z_posix_sysconf_SC_V7_ILP32_OFF32 _POSIX_V7_ILP32_OFF32
#define __z_posix_sysconf_SC_V7_ILP32_OFFBIG _POSIX_V7_ILP32_OFFBIG
#define __z_posix_sysconf_SC_V7_LP64_OFF64 _POSIX_V7_LP64_OFF64
#define __z_posix_sysconf_SC_V7_LPBIG_OFFBIG _POSIX_V7_LPBIG_OFFBIG
#define __z_posix_sysconf_SC_V6_ILP32_OFF32 _POSIX_V6_ILP32_OFF32
#define __z_posix_sysconf_SC_V6_ILP32_OFFBIG _POSIX_V6_ILP32_OFFBIG
#define __z_posix_sysconf_SC_V6_LP64_OFF64 _POSIX_V6_LP64_OFF64
#define __z_posix_sysconf_SC_V6_LPBIG_OFFBIG _POSIX_V6_LPBIG_OFFBIG
#define __z_posix_sysconf_SC_BC_BASE_MAX _POSIX2_BC_BASE_MAX
#define __z_posix_sysconf_SC_BC_DIM_MAX _POSIX2_BC_DIM_MAX
#define __z_posix_sysconf_SC_BC_SCALE_MAX _POSIX2_BC_SCALE_MAX
#define __z_posix_sysconf_SC_BC_STRING_MAX _POSIX2_BC_STRING_MAX
#define __z_posix_sysconf_SC_2_C_BIND _POSIX2_C_BIND
#define __z_posix_sysconf_SC_2_C_DEV _POSIX2_C_DEV
#define __z_posix_sysconf_SC_2_CHAR_TERM _POSIX2_CHAR_TERM
#define __z_posix_sysconf_SC_COLL_WEIGHTS_MAX _POSIX2_COLL_WEIGHTS_MAX
#define __z_posix_sysconf_SC_DELAYTIMER_MAX _POSIX2_DELAYTIMER_MAX
#define __z_posix_sysconf_SC_EXPR_NEST_MAX _POSIX2_EXPR_NEST_MAX
#define __z_posix_sysconf_SC_2_FORT_DEV _POSIX2_FORT_DEV
#define __z_posix_sysconf_SC_2_FORT_RUN _POSIX2_FORT_RUN
#define __z_posix_sysconf_SC_LINE_MAX _POSIX2_LINE_MAX
#define __z_posix_sysconf_SC_2_LOCALEDEF _POSIX2_LOCALEDEF
#define __z_posix_sysconf_SC_2_PBS _POSIX2_PBS
#define __z_posix_sysconf_SC_2_PBS_ACCOUNTING _POSIX2_PBS_ACCOUNTING
#define __z_posix_sysconf_SC_2_PBS_CHECKPOINT _POSIX2_PBS_CHECKPOINT
#define __z_posix_sysconf_SC_2_PBS_LOCATE _POSIX2_PBS_LOCATE
#define __z_posix_sysconf_SC_2_PBS_MESSAGE _POSIX2_PBS_MESSAGE
#define __z_posix_sysconf_SC_2_PBS_TRACK _POSIX2_PBS_TRACK
#define __z_posix_sysconf_SC_2_SW_DEV _POSIX2_SW_DEV
#define __z_posix_sysconf_SC_2_UPE _POSIX2_UPE
#define __z_posix_sysconf_SC_2_VERSION _POSIX2_VERSION
#define __z_posix_sysconf_SC_XOPEN_CRYPT _XOPEN_CRYPT
#define __z_posix_sysconf_SC_XOPEN_ENH_I18N _XOPEN_ENH_I18N
#define __z_posix_sysconf_SC_XOPEN_REALTIME _XOPEN_REALTIME
#define __z_posix_sysconf_SC_XOPEN_REALTIME_THREADS _XOPEN_REALTIME_THREADS
#define __z_posix_sysconf_SC_XOPEN_SHM _XOPEN_SHM
#define __z_posix_sysconf_SC_XOPEN_STREAMS _XOPEN_STREAMS
#define __z_posix_sysconf_SC_XOPEN_UNIX _XOPEN_UNIX
#define __z_posix_sysconf_SC_XOPEN_UUCP _XOPEN_UUCP
#define __z_posix_sysconf_SC_XOPEN_VERSION _XOPEN_VERSION
#define __z_posix_sysconf_SC_CLK_TCK (100L)
#define __z_posix_sysconf_SC_GETGR_R_SIZE_MAX (0L)
#define __z_posix_sysconf_SC_GETPW_R_SIZE_MAX (0L)
#define __z_posix_sysconf_SC_AIO_LISTIO_MAX AIO_LISTIO_MAX
#define __z_posix_sysconf_SC_AIO_MAX AIO_MAX
#define __z_posix_sysconf_SC_AIO_PRIO_DELTA_MAX AIO_PRIO_DELTA_MAX
#define __z_posix_sysconf_SC_ARG_MAX ARG_MAX
#define __z_posix_sysconf_SC_ATEXIT_MAX ATEXIT_MAX
#define __z_posix_sysconf_SC_CHILD_MAX CHILD_MAX
#define __z_posix_sysconf_SC_HOST_NAME_MAX HOST_NAME_MAX
#define __z_posix_sysconf_SC_IOV_MAX IOV_MAX
#define __z_posix_sysconf_SC_LOGIN_NAME_MAX LOGIN_NAME_MAX
#define __z_posix_sysconf_SC_NGROUPS_MAX _POSIX_NGROUPS_MAX
#define __z_posix_sysconf_SC_MQ_OPEN_MAX MQ_OPEN_MAX
#define __z_posix_sysconf_SC_MQ_PRIO_MAX MQ_PRIO_MAX
#define __z_posix_sysconf_SC_OPEN_MAX CONFIG_POSIX_MAX_FDS
#define __z_posix_sysconf_SC_PAGE_SIZE PAGE_SIZE
#define __z_posix_sysconf_SC_PAGESIZE PAGESIZE
#define __z_posix_sysconf_SC_THREAD_DESTRUCTOR_ITERATIONS PTHREAD_DESTRUCTOR_ITERATIONS
#define __z_posix_sysconf_SC_THREAD_KEYS_MAX PTHREAD_KEYS_MAX
#define __z_posix_sysconf_SC_THREAD_STACK_MIN PTHREAD_STACK_MIN
#define __z_posix_sysconf_SC_THREAD_THREADS_MAX PTHREAD_THREADS_MAX
#define __z_posix_sysconf_SC_RTSIG_MAX RTSIG_MAX
#define __z_posix_sysconf_SC_SEM_NSEMS_MAX SEM_NSEMS_MAX
#define __z_posix_sysconf_SC_SEM_VALUE_MAX SEM_VALUE_MAX
#define __z_posix_sysconf_SC_SIGQUEUE_MAX SIGQUEUE_MAX
#define __z_posix_sysconf_SC_STREAM_MAX STREAM_MAX
#define __z_posix_sysconf_SC_SYMLOOP_MAX SYMLOOP_MAX
#define __z_posix_sysconf_SC_TIMER_MAX TIMER_MAX
#define __z_posix_sysconf_SC_TTY_NAME_MAX TTY_NAME_MAX
#define __z_posix_sysconf_SC_TZNAME_MAX TZNAME_MAX
#define sysconf(x) (long)CONCAT(__z_posix_sysconf, x)
#endif
#endif
#ifdef __cplusplus
}
#endif
#endif /* ZEPHYR_INCLUDE_POSIX_SYS_SYSCONF_H_ */

153
include/zephyr/posix/unistd.h
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@ -7,20 +7,20 @@
#define ZEPHYR_INCLUDE_POSIX_UNISTD_H_
#include "posix_types.h"
#include <zephyr/posix/sys/stat.h>
#ifdef CONFIG_POSIX_API
#include <zephyr/fs/fs.h>
#endif
#ifdef CONFIG_NETWORKING
/* For zsock_gethostname() */
#include <zephyr/net/socket.h>
#include <zephyr/net/hostname.h>
#endif
#ifdef CONFIG_POSIX_API
#include <zephyr/fs/fs.h>
#endif
#ifdef CONFIG_POSIX_SYSCONF
#include <zephyr/posix/signal.h>
#endif
#include <zephyr/posix/sys/stat.h>
#include <zephyr/posix/sys/sysconf.h>
#ifdef __cplusplus
extern "C" {
@ -34,7 +34,7 @@ extern "C" {
/* Internal helper macro to set constant if required Kconfig symbol is enabled */
#define Z_SC_VAL_IFDEF(_def, _val) COND_CODE_1(_def, (_val), (-1L))
/* Constants for Opitions and Option Groups */
/* Constants for Options and Option Groups */
#define _POSIX_ADVISORY_INFO (-1L)
#define _POSIX_ASYNCHRONOUS_IO (-1L)
#define _POSIX_BARRIERS Z_SC_VAL_IFDEF(CONFIG_PTHREAD_IPC, _POSIX_VERSION)
@ -99,6 +99,7 @@ extern "C" {
#define _POSIX2_C_BIND _POSIX_VERSION
#define _POSIX2_C_DEV (-1L)
#define _POSIX2_CHAR_TERM (-1L)
#define _POSIX2_DELAYTIMER_MAX (-1L)
#define _POSIX2_FORT_DEV (-1L)
#define _POSIX2_FORT_RUN (-1L)
#define _POSIX2_LOCALEDEF (-1L)
@ -191,6 +192,10 @@ extern "C" {
#define MQ_OPEN_MAX _POSIX_MQ_OPEN_MAX
#define MQ_PRIO_MAX _POSIX_MQ_PRIO_MAX
#ifndef ATEXIT_MAX
#define ATEXIT_MAX 8
#endif
#ifndef PAGE_SIZE
#define PAGE_SIZE BIT(CONFIG_POSIX_PAGE_SIZE_BITS)
#endif
@ -257,137 +262,9 @@ extern int opterr, optind, optopt;
pid_t getpid(void);
unsigned sleep(unsigned int seconds);
int usleep(useconds_t useconds);
#ifdef CONFIG_POSIX_SYSCONF
#define __z_posix_sysconf_SC_ADVISORY_INFO _POSIX_ADVISORY_INFO
#define __z_posix_sysconf_SC_ASYNCHRONOUS_IO _POSIX_ASYNCHRONOUS_IO
#define __z_posix_sysconf_SC_BARRIERS _POSIX_BARRIERS
#define __z_posix_sysconf_SC_CLOCK_SELECTION _POSIX_CLOCK_SELECTION
#define __z_posix_sysconf_SC_CPUTIME _POSIX_CPUTIME
#define __z_posix_sysconf_SC_FSYNC _POSIX_FSYNC
#define __z_posix_sysconf_SC_IPV6 _POSIX_IPV6
#define __z_posix_sysconf_SC_JOB_CONTROL _POSIX_JOB_CONTROL
#define __z_posix_sysconf_SC_MAPPED_FILE _POSIX_MAPPED_FILES
#define __z_posix_sysconf_SC_MEMLOCK _POSIX_MEMLOCK
#define __z_posix_sysconf_SC_MEMLOCK_RANGE _POSIX_MEMLOCK_RANGE
#define __z_posix_sysconf_SC_MEMORY_PROTECTION _POSIX_MEMORY_PROTECTION
#define __z_posix_sysconf_SC_MESSAGE_PASSING _POSIX_MESSAGE_PASSING
#define __z_posix_sysconf_SC_MONOTONIC_CLOCK _POSIX_MONOTONIC_CLOCK
#define __z_posix_sysconf_SC_PRIORITIZED_IO _POSIX_PRIORITIZED_IO
#define __z_posix_sysconf_SC_PRIORITY_SCHEDULING _POSIX_PRIORITY_SCHEDULING
#define __z_posix_sysconf_SC_RAW_SOCKETS _POSIX_RAW_SOCKETS
#define __z_posix_sysconf_SC_RE_DUP_MAX _POSIX_RE_DUP_MAX
#define __z_posix_sysconf_SC_READER_WRITER_LOCKS _POSIX_READER_WRITER_LOCKS
#define __z_posix_sysconf_SC_REALTIME_SIGNALS _POSIX_REALTIME_SIGNALS
#define __z_posix_sysconf_SC_REGEXP _POSIX_REGEXP
#define __z_posix_sysconf_SC_SAVED_IDS _POSIX_SAVED_IDS
#define __z_posix_sysconf_SC_SEMAPHORES _POSIX_SEMAPHORES
#define __z_posix_sysconf_SC_SHARED_MEMORY_OBJECTS _POSIX_SHARED_MEMORY_OBJECTS
#define __z_posix_sysconf_SC_SHELL _POSIX_SHELL
#define __z_posix_sysconf_SC_SPAWN _POSIX_SPAWN
#define __z_posix_sysconf_SC_SPIN_LOCKS _POSIX_SPIN_LOCKS
#define __z_posix_sysconf_SC_SPORADIC_SERVER _POSIX_SPORADIC_SERVER
#define __z_posix_sysconf_SC_SS_REPL_MAX _POSIX_SS_REPL_MAX
#define __z_posix_sysconf_SC_SYNCHRONIZED_IO _POSIX_SYNCHRONIZED_IO
#define __z_posix_sysconf_SC_THREAD_ATTR_STACKADDR _POSIX_THREAD_ATTR_STACKADDR
#define __z_posix_sysconf_SC_THREAD_ATTR_STACKSIZE _POSIX_THREAD_ATTR_STACKSIZE
#define __z_posix_sysconf_SC_THREAD_CPUTIME _POSIX_THREAD_CPUTIME
#define __z_posix_sysconf_SC_THREAD_PRIO_INHERIT _POSIX_THREAD_PRIO_INHERIT
#define __z_posix_sysconf_SC_THREAD_PRIO_PROTECT _POSIX_THREAD_PRIO_PROTECT
#define __z_posix_sysconf_SC_THREAD_PRIORITY_SCHEDULING _POSIX_THREAD_PRIORITY_SCHEDULING
#define __z_posix_sysconf_SC_THREAD_PROCESS_SHARED _POSIX_THREAD_PROCESS_SHARED
#define __z_posix_sysconf_SC_THREAD_ROBUST_PRIO_INHERIT _POSIX_THREAD_ROBUST_PRIO_INHERIT
#define __z_posix_sysconf_SC_THREAD_ROBUST_PRIO_PROTECT _POSIX_THREAD_ROBUST_PRIO_PROTECT
#define __z_posix_sysconf_SC_THREAD_SAFE_FUNCTIONS _POSIX_THREAD_SAFE_FUNCTIONS
#define __z_posix_sysconf_SC_THREAD_SPORADIC_SERVER _POSIX_THREAD_SPORADIC_SERVER
#define __z_posix_sysconf_SC_THREADS _POSIX_THREADS
#define __z_posix_sysconf_SC_TIMEOUTS _POSIX_TIMEOUTS
#define __z_posix_sysconf_SC_TIMERS _POSIX_TIMERS
#define __z_posix_sysconf_SC_TRACE _POSIX_TRACE
#define __z_posix_sysconf_SC_TRACE_EVENT_FILTER _POSIX_TRACE_EVENT_FILTER
#define __z_posix_sysconf_SC_TRACE_EVENT_NAME_MAX _POSIX_TRACE_EVENT_NAME_MAX
#define __z_posix_sysconf_SC_TRACE_INHERIT _POSIX_TRACE_INHERIT
#define __z_posix_sysconf_SC_TRACE_LOG _POSIX_TRACE_LOG
#define __z_posix_sysconf_SC_TRACE_NAME_MAX _POSIX_TRACE_NAME_MAX
#define __z_posix_sysconf_SC_TRACE_SYS_MAX _POSIX_TRACE_SYS_MAX
#define __z_posix_sysconf_SC_TRACE_USER_EVENT_MAX _POSIX_TRACE_USER_EVENT_MAX
#define __z_posix_sysconf_SC_TYPED_MEMORY_OBJECTS _POSIX_TYPED_MEMORY_OBJECTS
#define __z_posix_sysconf_SC_VERSION _POSIX_VERSION
#define __z_posix_sysconf_SC_V7_ILP32_OFF32 _POSIX_V7_ILP32_OFF32
#define __z_posix_sysconf_SC_V7_ILP32_OFFBIG _POSIX_V7_ILP32_OFFBIG
#define __z_posix_sysconf_SC_V7_LP64_OFF64 _POSIX_V7_LP64_OFF64
#define __z_posix_sysconf_SC_V7_LPBIG_OFFBIG _POSIX_V7_LPBIG_OFFBIG
#define __z_posix_sysconf_SC_V6_ILP32_OFF32 _POSIX_V6_ILP32_OFF32
#define __z_posix_sysconf_SC_V6_ILP32_OFFBIG _POSIX_V6_ILP32_OFFBIG
#define __z_posix_sysconf_SC_V6_LP64_OFF64 _POSIX_V6_LP64_OFF64
#define __z_posix_sysconf_SC_V6_LPBIG_OFFBIG _POSIX_V6_LPBIG_OFFBIG
#define __z_posix_sysconf_SC_BC_BASE_MAX _POSIX2_BC_BASE_MAX
#define __z_posix_sysconf_SC_BC_DIM_MAX _POSIX2_BC_DIM_MAX
#define __z_posix_sysconf_SC_BC_SCALE_MAX _POSIX2_BC_SCALE_MAX
#define __z_posix_sysconf_SC_BC_STRING_MAX _POSIX2_BC_STRING_MAX
#define __z_posix_sysconf_SC_2_C_BIND _POSIX2_C_BIND
#define __z_posix_sysconf_SC_2_C_DEV _POSIX2_C_DEV
#define __z_posix_sysconf_SC_2_CHAR_TERM _POSIX2_CHAR_TERM
#define __z_posix_sysconf_SC_COLL_WEIGHTS_MAX _POSIX2_COLL_WEIGHTS_MAX
#define __z_posix_sysconf_SC_DELAYTIMER_MAX _POSIX2_DELAYTIMER_MAX
#define __z_posix_sysconf_SC_EXPR_NEST_MAX _POSIX2_EXPR_NEST_MAX
#define __z_posix_sysconf_SC_2_FORT_DEV _POSIX2_FORT_DEV
#define __z_posix_sysconf_SC_2_FORT_RUN _POSIX2_FORT_RUN
#define __z_posix_sysconf_SC_LINE_MAX _POSIX2_LINE_MAX
#define __z_posix_sysconf_SC_2_LOCALEDEF _POSIX2_LOCALEDEF
#define __z_posix_sysconf_SC_2_PBS _POSIX2_PBS
#define __z_posix_sysconf_SC_2_PBS_ACCOUNTING _POSIX2_PBS_ACCOUNTING
#define __z_posix_sysconf_SC_2_PBS_CHECKPOINT _POSIX2_PBS_CHECKPOINT
#define __z_posix_sysconf_SC_2_PBS_LOCATE _POSIX2_PBS_LOCATE
#define __z_posix_sysconf_SC_2_PBS_MESSAGE _POSIX2_PBS_MESSAGE
#define __z_posix_sysconf_SC_2_PBS_TRACK _POSIX2_PBS_TRACK
#define __z_posix_sysconf_SC_2_SW_DEV _POSIX2_SW_DEV
#define __z_posix_sysconf_SC_2_UPE _POSIX2_UPE
#define __z_posix_sysconf_SC_2_VERSION _POSIX2_VERSION
#define __z_posix_sysconf_SC_XOPEN_CRYPT _XOPEN_CRYPT
#define __z_posix_sysconf_SC_XOPEN_ENH_I18N _XOPEN_ENH_I18N
#define __z_posix_sysconf_SC_XOPEN_REALTIME _XOPEN_REALTIME
#define __z_posix_sysconf_SC_XOPEN_REALTIME_THREADS _XOPEN_REALTIME_THREADS
#define __z_posix_sysconf_SC_XOPEN_SHM _XOPEN_SHM
#define __z_posix_sysconf_SC_XOPEN_STREAMS _XOPEN_STREAMS
#define __z_posix_sysconf_SC_XOPEN_UNIX _XOPEN_UNIX
#define __z_posix_sysconf_SC_XOPEN_UUCP _XOPEN_UUCP
#define __z_posix_sysconf_SC_XOPEN_VERSION _XOPEN_VERSION
#define __z_posix_sysconf_SC_CLK_TCK (100L)
#define __z_posix_sysconf_SC_GETGR_R_SIZE_MAX (0L)
#define __z_posix_sysconf_SC_GETPW_R_SIZE_MAX (0L)
#define __z_posix_sysconf_SC_AIO_LISTIO_MAX AIO_LISTIO_MAX
#define __z_posix_sysconf_SC_AIO_MAX AIO_MAX
#define __z_posix_sysconf_SC_AIO_PRIO_DELTA_MAX AIO_PRIO_DELTA_MAX
#define __z_posix_sysconf_SC_ARG_MAX ARG_MAX
#define __z_posix_sysconf_SC_ATEXIT_MAX ATEXIT_MAX
#define __z_posix_sysconf_SC_CHILD_MAX CHILD_MAX
#define __z_posix_sysconf_SC_HOST_NAME_MAX HOST_NAME_MAX
#define __z_posix_sysconf_SC_IOV_MAX IOV_MAX
#define __z_posix_sysconf_SC_LOGIN_NAME_MAX LOGIN_NAME_MAX
#define __z_posix_sysconf_SC_NGROUPS_MAX _POSIX_NGROUPS_MAX
#define __z_posix_sysconf_SC_MQ_OPEN_MAX MQ_OPEN_MAX
#define __z_posix_sysconf_SC_MQ_PRIO_MAX MQ_PRIO_MAX
#define __z_posix_sysconf_SC_OPEN_MAX CONFIG_POSIX_MAX_FDS
#define __z_posix_sysconf_SC_PAGE_SIZE PAGE_SIZE
#define __z_posix_sysconf_SC_PAGESIZE PAGESIZE
#define __z_posix_sysconf_SC_THREAD_DESTRUCTOR_ITERATIONS PTHREAD_DESTRUCTOR_ITERATIONS
#define __z_posix_sysconf_SC_THREAD_KEYS_MAX PTHREAD_KEYS_MAX
#define __z_posix_sysconf_SC_THREAD_STACK_MIN PTHREAD_STACK_MIN
#define __z_posix_sysconf_SC_THREAD_THREADS_MAX PTHREAD_THREADS_MAX
#define __z_posix_sysconf_SC_RTSIG_MAX RTSIG_MAX
#define __z_posix_sysconf_SC_SEM_NSEMS_MAX SEM_NSEMS_MAX
#define __z_posix_sysconf_SC_SEM_VALUE_MAX SEM_VALUE_MAX
#define __z_posix_sysconf_SC_SIGQUEUE_MAX SIGQUEUE_MAX
#define __z_posix_sysconf_SC_STREAM_MAX STREAM_MAX
#define __z_posix_sysconf_SC_SYMLOOP_MAX SYMLOOP_MAX
#define __z_posix_sysconf_SC_TIMER_MAX TIMER_MAX
#define __z_posix_sysconf_SC_TTY_NAME_MAX TTY_NAME_MAX
#define __z_posix_sysconf_SC_TZNAME_MAX TZNAME_MAX
#define sysconf(x) (long)CONCAT(__z_posix_sysconf, x)
#endif /* CONFIG_POSIX_SYSCONF */
#ifdef CONFIG_POSIX_SYSCONF_IMPL_FULL
long sysconf(int opt);
#endif
#ifdef __cplusplus
}

1
lib/posix/options/CMakeLists.txt
View file

@ -45,6 +45,7 @@ zephyr_library_sources_ifdef(CONFIG_POSIX_FS fs.c)
zephyr_library_sources_ifdef(CONFIG_POSIX_MQUEUE mqueue.c)
zephyr_library_sources_ifdef(CONFIG_POSIX_PUTMSG stropts.c)
zephyr_library_sources_ifdef(CONFIG_POSIX_SIGNAL signal.c ${STRSIGNAL_TABLE_H})
zephyr_library_sources_ifdef(CONFIG_POSIX_SYSCONF_IMPL_FULL sysconf.c)
zephyr_library_sources_ifdef(CONFIG_POSIX_SYSLOG syslog.c)
zephyr_library_sources_ifdef(CONFIG_POSIX_UNAME uname.c)
zephyr_library_sources_ifdef(CONFIG_PTHREAD_IPC _common.c)

24
lib/posix/options/Kconfig.sysconf
View file

@ -21,4 +21,28 @@ config POSIX_PAGE_SIZE_BITS
PAGE_SIZE is supported in the range [64, 65536]
If CONFIG_POSIX_API=y, PAGE_SIZE defaults to 4096, otherwise, it is 64 bytes.
if POSIX_SYSCONF
choice POSIX_SYSCONF_IMPL_CHOICE
default POSIX_SYSCONF_IMPL_FULL if CPP
default POSIX_SYSCONF_IMPL_MACRO
prompt "Sysconf implementation method"
config POSIX_SYSCONF_IMPL_MACRO
bool "Macro"
help
The sysconf() function is implemented compile-time constant via macros. This is the option
with the least overhead. The downside is that sysconf() is not an addressable function.
config POSIX_SYSCONF_IMPL_FULL
bool "Full"
help
The sysconf() function is implemented as a large integer-integer array. The advantage if this
option is that all sysconf() options can be queried and that the sysconf() symbol is
addressable.
endchoice
endif # POSIX_SYSCONF
endmenu # "Sysconf support"

266
lib/posix/options/sysconf.c Normal file
View file

@ -0,0 +1,266 @@
/*
* Copyright (c) 2024, Meta
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr/posix/unistd.h>
long sysconf(int x)
{
switch (x) {
case _SC_ADVISORY_INFO:
return _POSIX_ADVISORY_INFO;
case _SC_ASYNCHRONOUS_IO:
return _POSIX_ASYNCHRONOUS_IO;
case _SC_BARRIERS:
return _POSIX_BARRIERS;
case _SC_CLOCK_SELECTION:
return _POSIX_CLOCK_SELECTION;
case _SC_CPUTIME:
return _POSIX_CPUTIME;
case _SC_FSYNC:
return _POSIX_FSYNC;
case _SC_IPV6:
return _POSIX_IPV6;
case _SC_JOB_CONTROL:
return _POSIX_JOB_CONTROL;
case _SC_MAPPED_FILE:
return _POSIX_MAPPED_FILES;
case _SC_MEMLOCK:
return _POSIX_MEMLOCK;
case _SC_MEMLOCK_RANGE:
return _POSIX_MEMLOCK_RANGE;
case _SC_MEMORY_PROTECTION:
return _POSIX_MEMORY_PROTECTION;
case _SC_MESSAGE_PASSING:
return _POSIX_MESSAGE_PASSING;
case _SC_MONOTONIC_CLOCK:
return _POSIX_MONOTONIC_CLOCK;
case _SC_PRIORITIZED_IO:
return _POSIX_PRIORITIZED_IO;
case _SC_PRIORITY_SCHEDULING:
return _POSIX_PRIORITY_SCHEDULING;
case _SC_RAW_SOCKETS:
return _POSIX_RAW_SOCKETS;
case _SC_RE_DUP_MAX:
return _POSIX_RE_DUP_MAX;
case _SC_READER_WRITER_LOCKS:
return _POSIX_READER_WRITER_LOCKS;
case _SC_REALTIME_SIGNALS:
return _POSIX_REALTIME_SIGNALS;
case _SC_REGEXP:
return _POSIX_REGEXP;
case _SC_SAVED_IDS:
return _POSIX_SAVED_IDS;
case _SC_SEMAPHORES:
return _POSIX_SEMAPHORES;
case _SC_SHARED_MEMORY_OBJECTS:
return _POSIX_SHARED_MEMORY_OBJECTS;
case _SC_SHELL:
return _POSIX_SHELL;
case _SC_SPAWN:
return _POSIX_SPAWN;
case _SC_SPIN_LOCKS:
return _POSIX_SPIN_LOCKS;
case _SC_SPORADIC_SERVER:
return _POSIX_SPORADIC_SERVER;
case _SC_SS_REPL_MAX:
return _POSIX_SS_REPL_MAX;
case _SC_SYNCHRONIZED_IO:
return _POSIX_SYNCHRONIZED_IO;
case _SC_THREAD_ATTR_STACKADDR:
return _POSIX_THREAD_ATTR_STACKADDR;
case _SC_THREAD_ATTR_STACKSIZE:
return _POSIX_THREAD_ATTR_STACKSIZE;
case _SC_THREAD_CPUTIME:
return _POSIX_THREAD_CPUTIME;
case _SC_THREAD_PRIO_INHERIT:
return _POSIX_THREAD_PRIO_INHERIT;
case _SC_THREAD_PRIO_PROTECT:
return _POSIX_THREAD_PRIO_PROTECT;
case _SC_THREAD_PRIORITY_SCHEDULING:
return _POSIX_THREAD_PRIORITY_SCHEDULING;
case _SC_THREAD_PROCESS_SHARED:
return _POSIX_THREAD_PROCESS_SHARED;
case _SC_THREAD_ROBUST_PRIO_INHERIT:
return _POSIX_THREAD_ROBUST_PRIO_INHERIT;
case _SC_THREAD_ROBUST_PRIO_PROTECT:
return _POSIX_THREAD_ROBUST_PRIO_PROTECT;
case _SC_THREAD_SAFE_FUNCTIONS:
return _POSIX_THREAD_SAFE_FUNCTIONS;
case _SC_THREAD_SPORADIC_SERVER:
return _POSIX_THREAD_SPORADIC_SERVER;
case _SC_THREADS:
return _POSIX_THREADS;
case _SC_TIMEOUTS:
return _POSIX_TIMEOUTS;
case _SC_TIMERS:
return _POSIX_TIMERS;
case _SC_TRACE:
return _POSIX_TRACE;
case _SC_TRACE_EVENT_FILTER:
return _POSIX_TRACE_EVENT_FILTER;
case _SC_TRACE_EVENT_NAME_MAX:
return _POSIX_TRACE_EVENT_NAME_MAX;
case _SC_TRACE_INHERIT:
return _POSIX_TRACE_INHERIT;
case _SC_TRACE_LOG:
return _POSIX_TRACE_LOG;
case _SC_TRACE_NAME_MAX:
return _POSIX_TRACE_NAME_MAX;
case _SC_TRACE_SYS_MAX:
return _POSIX_TRACE_SYS_MAX;
case _SC_TRACE_USER_EVENT_MAX:
return _POSIX_TRACE_USER_EVENT_MAX;
case _SC_TYPED_MEMORY_OBJECTS:
return _POSIX_TYPED_MEMORY_OBJECTS;
case _SC_VERSION:
return _POSIX_VERSION;
case _SC_V7_ILP32_OFF32:
return _POSIX_V7_ILP32_OFF32;
case _SC_V7_ILP32_OFFBIG:
return _POSIX_V7_ILP32_OFFBIG;
case _SC_V7_LP64_OFF64:
return _POSIX_V7_LP64_OFF64;
case _SC_V7_LPBIG_OFFBIG:
return _POSIX_V7_LPBIG_OFFBIG;
case _SC_V6_ILP32_OFF32:
return _POSIX_V6_ILP32_OFF32;
case _SC_V6_ILP32_OFFBIG:
return _POSIX_V6_ILP32_OFFBIG;
case _SC_V6_LP64_OFF64:
return _POSIX_V6_LP64_OFF64;
case _SC_V6_LPBIG_OFFBIG:
return _POSIX_V6_LPBIG_OFFBIG;
case _SC_BC_BASE_MAX:
return _POSIX2_BC_BASE_MAX;
case _SC_BC_DIM_MAX:
return _POSIX2_BC_DIM_MAX;
case _SC_BC_SCALE_MAX:
return _POSIX2_BC_SCALE_MAX;
case _SC_BC_STRING_MAX:
return _POSIX2_BC_STRING_MAX;
case _SC_2_C_BIND:
return _POSIX2_C_BIND;
case _SC_2_C_DEV:
return _POSIX2_C_DEV;
case _SC_2_CHAR_TERM:
return _POSIX2_CHAR_TERM;
case _SC_COLL_WEIGHTS_MAX:
return _POSIX2_COLL_WEIGHTS_MAX;
case _SC_DELAYTIMER_MAX:
return _POSIX2_DELAYTIMER_MAX;
case _SC_EXPR_NEST_MAX:
return _POSIX2_EXPR_NEST_MAX;
case _SC_2_FORT_DEV:
return _POSIX2_FORT_DEV;
case _SC_2_FORT_RUN:
return _POSIX2_FORT_RUN;
case _SC_LINE_MAX:
return _POSIX2_LINE_MAX;
case _SC_2_LOCALEDEF:
return _POSIX2_LOCALEDEF;
case _SC_2_PBS:
return _POSIX2_PBS;
case _SC_2_PBS_ACCOUNTING:
return _POSIX2_PBS_ACCOUNTING;
case _SC_2_PBS_CHECKPOINT:
return _POSIX2_PBS_CHECKPOINT;
case _SC_2_PBS_LOCATE:
return _POSIX2_PBS_LOCATE;
case _SC_2_PBS_MESSAGE:
return _POSIX2_PBS_MESSAGE;
case _SC_2_PBS_TRACK:
return _POSIX2_PBS_TRACK;
case _SC_2_SW_DEV:
return _POSIX2_SW_DEV;
case _SC_2_UPE:
return _POSIX2_UPE;
case _SC_2_VERSION:
return _POSIX2_VERSION;
case _SC_XOPEN_CRYPT:
return _XOPEN_CRYPT;
case _SC_XOPEN_ENH_I18N:
return _XOPEN_ENH_I18N;
case _SC_XOPEN_REALTIME:
return _XOPEN_REALTIME;
case _SC_XOPEN_REALTIME_THREADS:
return _XOPEN_REALTIME_THREADS;
case _SC_XOPEN_SHM:
return _XOPEN_SHM;
case _SC_XOPEN_STREAMS:
return _XOPEN_STREAMS;
case _SC_XOPEN_UNIX:
return _XOPEN_UNIX;
case _SC_XOPEN_UUCP:
return _XOPEN_UUCP;
case _SC_XOPEN_VERSION:
return _XOPEN_VERSION;
case _SC_CLK_TCK:
return (100L);
case _SC_GETGR_R_SIZE_MAX:
return (0L);
case _SC_GETPW_R_SIZE_MAX:
return (0L);
case _SC_AIO_LISTIO_MAX:
return AIO_LISTIO_MAX;
case _SC_AIO_MAX:
return AIO_MAX;
case _SC_AIO_PRIO_DELTA_MAX:
return AIO_PRIO_DELTA_MAX;
case _SC_ARG_MAX:
return ARG_MAX;
case _SC_ATEXIT_MAX:
return ATEXIT_MAX;
case _SC_CHILD_MAX:
return CHILD_MAX;
case _SC_HOST_NAME_MAX:
return _POSIX_HOST_NAME_MAX;
case _SC_IOV_MAX:
return IOV_MAX;
case _SC_LOGIN_NAME_MAX:
return LOGIN_NAME_MAX;
case _SC_NGROUPS_MAX:
return _POSIX_NGROUPS_MAX;
case _SC_MQ_OPEN_MAX:
return MQ_OPEN_MAX;
case _SC_MQ_PRIO_MAX:
return MQ_PRIO_MAX;
case _SC_OPEN_MAX:
return CONFIG_POSIX_MAX_FDS;
case _SC_PAGE_SIZE:
return PAGE_SIZE;
case _SC_PAGESIZE:
return PAGESIZE;
case _SC_THREAD_DESTRUCTOR_ITERATIONS:
return PTHREAD_DESTRUCTOR_ITERATIONS;
case _SC_THREAD_KEYS_MAX:
return PTHREAD_KEYS_MAX;
case _SC_THREAD_STACK_MIN:
return PAGE_SIZE;
case _SC_THREAD_THREADS_MAX:
return PTHREAD_THREADS_MAX;
case _SC_RTSIG_MAX:
return RTSIG_MAX;
case _SC_SEM_NSEMS_MAX:
return SEM_NSEMS_MAX;
case _SC_SEM_VALUE_MAX:
return SEM_VALUE_MAX;
case _SC_SIGQUEUE_MAX:
return SIGQUEUE_MAX;
case _SC_STREAM_MAX:
return STREAM_MAX;
case _SC_SYMLOOP_MAX:
return SYMLOOP_MAX;
case _SC_TIMER_MAX:
return TIMER_MAX;
case _SC_TTY_NAME_MAX:
return TTY_NAME_MAX;
case _SC_TZNAME_MAX:
return TZNAME_MAX;
default:
errno = EINVAL;
return -1;
}
}