THRD_CREATE(3C) Standard C Library Functions THRD_CREATE(3C)


thrd_create - create a thread


#include <threads.h>

typedef int (*thrd_start_t)(void *);

thrd_create(thrd_t *thrdp, thrd_start_t func, void *arg);


The thrd_create() function creates a new thread of execution inside of the
current process and stores its identifier in thrdp. Each thread operates
concurrently within the process.

When a thread is created, it begins its execution at the function func with
the argument arg. A created thread has access to all global data within a
process; however, it has its own private stack. Currently 32-bit processes
have a default stack of 1 megabyte, while 64-bit systems have a default
stack size of 2 megabytes. In addition, newly created threads inherit the
signal mask of the thread which created them; however, they do not inherit
any pending signals.

Once created, a thread will continue to execute until either, it returns
from its initial function, the thread explicitly calls thrd_exit(3C), or
the process itself terminates, such as with a call to exit(2). When the
initial function returns, it behaves as though a call to thrd_exit(3C) was
made, and, if the thread has not been detached with a call to
thrd_detach(3C), the exit status remains available and the corresponding
thread ID will not be reused until a process calls thrd_join(3C). This is
similar to how a parent must call wait(3C), to clean up a child process
that has terminated.

For a richer interface interface with more control over aspects of the
newly created thread, such as stack size, stack placement, and the like,
see thr_create(3C) and pthread_create(3C).


Upon successful completion, the thrd_create() function returns
thrd_success. If insufficient memory was available, then thrd_nomem is
returned. Otherwise, thrd_error is returned, indicating that a non-memory
related error.





pthread_create(3C), thr_create(3C), thrd_detach(3C), thrd_join(3C),
attributes(7), threads(7)

OmniOS January 13, 2015 OmniOS