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85 lines
3.5 KiB
C
85 lines
3.5 KiB
C
/* Copyright (C) 1994-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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/* Declare the few Mach system calls (except mach_msg, in <mach/message.h>).
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This does not include the kernel RPC shortcut calls (in <mach-shortcuts.h>).
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This file omits the MACH_IPC_COMPAT functions. */
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#ifndef _MACH_MACH_TRAPS_H
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#define _MACH_MACH_TRAPS_H_ 1
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#include <mach/port.h>
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#include <mach/message.h> /* mach_msg_timeout_t */
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#include <mach/kern_return.h>
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/* Create and return a new receive right. */
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extern mach_port_t mach_reply_port (void);
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extern mach_port_t __mach_reply_port (void);
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/* Return the thread control port for the calling thread. */
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extern mach_port_t mach_thread_self (void);
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extern mach_port_t __mach_thread_self (void);
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/* Return the task control port for the calling task.
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The parens are needed to protect against the macro in <mach_init.h>. */
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extern mach_port_t (mach_task_self) (void);
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extern mach_port_t (__mach_task_self) (void);
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/* Return the host information port for the host of the calling task.
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The parens are needed to protect against the macro in <mach_init.h>. */
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extern mach_port_t (mach_host_self) (void);
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extern mach_port_t (__mach_host_self) (void);
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/* Attempt to context switch the current thread off the processor. Returns
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true if there are other threads that can be run and false if not. */
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extern boolean_t swtch (void);
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extern boolean_t __swtch (void);
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/* Attempt to context switch the current thread off the processor. Lower
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the thread's priority as much as possible. The thread's priority will
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be restored when it runs again. PRIORITY is currently unused. Return
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true if there are other threads that can be run and false if not. */
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extern boolean_t swtch_pri (int priority);
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extern boolean_t __swtch_pri (int priority);
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/* Attempt to context switch the current thread off the processor. Try
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to run NEW_THREAD next, ignoring normal scheduling policies. The
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OPTION value comes from <mach/thread_switch.h>. If OPTION is
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SWITCH_OPTION_WAIT, then block the current thread for TIME
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milliseconds. If OPTION is SWITCH_OPTION_DEPRESS, then block for
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TIME milliseconds and depress the thread's priority as done by
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swtch_pri. If OPTION is SWITCH_OPTION_NONE, ignore TIME. */
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kern_return_t thread_switch (mach_port_t new_thread,
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int option, mach_msg_timeout_t option_time);
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kern_return_t __thread_switch (mach_port_t new_thread,
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int option, mach_msg_timeout_t option_time);
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/* Block the current thread until the kernel (or device) event
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identified by EVENT occurs. */
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kern_return_t evc_wait (unsigned int event);
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kern_return_t __evc_wait (unsigned int event);
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/* Display a null-terminated character string on the Mach console. This
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system call is meant as a debugging tool useful to circumvent messaging
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altogether. */
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extern void mach_print(const char *s);
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#endif /* mach/mach_traps.h */
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