diff options
Diffstat (limited to 'man3/sem_init.3')
| -rw-r--r-- | man3/sem_init.3 | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/man3/sem_init.3 b/man3/sem_init.3 index 5f9c352..0cae896 100644 --- a/man3/sem_init.3 +++ b/man3/sem_init.3 @@ -3,7 +3,7 @@ .\" .\" SPDX-License-Identifier: Linux-man-pages-copyleft .\" -.TH sem_init 3 2023-07-20 "Linux man-pages 6.05.01" +.TH sem_init 3 2023-10-31 "Linux man-pages 6.7" .SH NAME sem_init \- initialize an unnamed semaphore .SH LIBRARY @@ -12,7 +12,7 @@ POSIX threads library .SH SYNOPSIS .nf .B #include <semaphore.h> -.PP +.P .BI "int sem_init(sem_t *" sem ", int " pshared ", unsigned int " value ); .fi .SH DESCRIPTION @@ -22,12 +22,12 @@ initializes the unnamed semaphore at the address pointed to by The .I value argument specifies the initial value for the semaphore. -.PP +.P The .I pshared argument indicates whether this semaphore is to be shared between the threads of a process, or between processes. -.PP +.P If .I pshared has the value 0, @@ -35,7 +35,7 @@ then the semaphore is shared between the threads of a process, and should be located at some address that is visible to all threads (e.g., a global variable, or a variable allocated dynamically on the heap). -.PP +.P If .I pshared is nonzero, then the semaphore is shared between processes, @@ -52,7 +52,7 @@ can operate on the semaphore using .BR sem_post (3), .BR sem_wait (3), and so on. -.PP +.P Initializing a semaphore that has already been initialized results in undefined behavior. .SH RETURN VALUE @@ -87,12 +87,11 @@ T{ .BR sem_init () T} Thread safety MT-Safe .TE -.sp 1 .SH STANDARDS POSIX.1-2008. .SH HISTORY POSIX.1-2001. -.PP +.P Bizarrely, POSIX.1-2001 does not specify the value that should be returned by a successful call to .BR sem_init (). |