Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/man/mach_task_self.man
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1 .\" 2 .\" Mach Operating System 3 .\" Copyright (c) 1991,1990 Carnegie Mellon University 4 .\" All Rights Reserved. 5 .\" 6 .\" Permission to use, copy, modify and distribute this software and its 7 .\" documentation is hereby granted, provided that both the copyright 8 .\" notice and this permission notice appear in all copies of the 9 .\" software, derivative works or modified versions, and any portions 10 .\" thereof, and that both notices appear in supporting documentation. 11 .\" 12 .\" CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 13 .\" CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 14 .\" ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 15 .\" 16 .\" Carnegie Mellon requests users of this software to return to 17 .\" 18 .\" Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 19 .\" School of Computer Science 20 .\" Carnegie Mellon University 21 .\" Pittsburgh PA 15213-3890 22 .\" 23 .\" any improvements or extensions that they make and grant Carnegie Mellon 24 .\" the rights to redistribute these changes. 25 .\" 26 .\" 27 .\" HISTORY 28 .\" $Log: mach_task_self.man,v $ 29 .\" Revision 2.4 91/05/14 17:08:14 mrt 30 .\" Correcting copyright 31 .\" 32 .\" Revision 2.3 91/02/14 14:12:21 mrt 33 .\" Changed to new Mach copyright 34 .\" [91/02/12 18:12:34 mrt] 35 .\" 36 .\" Revision 2.2 90/08/07 18:38:52 rpd 37 .\" Created. 38 .\" 39 .TH mach_task_self 2 9/19/86 40 .CM 4 41 .SH NAME 42 .nf 43 mach_task_self \- return calling thread's task port 44 .SH SYNOPSIS 45 .nf 46 .ft B 47 #include <mach/mach_traps.h> 48 49 mach_port_t mach_task_self(); 50 .fi 51 .ft P 52 .SH DESCRIPTION 53 The \fBmach_task_self\fR system call returns the calling thread's task port. 54 55 \fBmach_task_self\fR has an effect equivalent to receiving 56 a send right for the task port. \fBmach_task_self\fR 57 returns the name of the send right. In particular, 58 successive calls will increase the calling task's 59 user-reference count for the send right. 60 .SH DIAGNOSTICS 61 .TP 25 62 MACH_PORT_NULL 63 A resource shortage prevented the reception of the send right. 64 .TP 25 65 MACH_PORT_NULL 66 The task port is currently null. 67 .TP 25 68 MACH_PORT_DEAD 69 The task port is currently dead. 70 .SH SEE ALSO 71 mach_thread_self(2), task_special_ports(2). 72 .SH BUGS 73 The file <mach_init.h> redefines \fBmach_task_self\fR 74 to be a macro returning the value of a global variable. 75 Before \fBmain\fR is called, libmach code uses the 76 \fBmach_task_self\fR system call to initialize the global variable.
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