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Set the amount of memory to preallocate for a thread's MAP_LAZY stack
#include <pthread.h>
int pthread_attr_setstackprealloc(
const pthread_attr_t * attr,
size_t stacksize);
- attr
- A pointer to the pthread_attr_t structure that defines
the attributes to use when creating new threads.
For more information, see
pthread_attr_init().
- stacksize
- The amount of stack you want to preallocate for new threads.
libc
Use the -l c option to
qcc
to link against this library.
This library is usually included automatically.
The pthread_attr_setstackprealloc() function sets the size of
the memory to preallocate for a thread's MAP_LAZY stack.
By default,
the system allocates sysconf(_SC_PAGESIZE) bytes of physical
memory for the initial stack reference.
This function allows you to change this default memory size, if you know
that a thread will need more stack space. Semantically, there is no
difference in operation, but the memory manager attempts to make more
efficient use of Memory Management Unit hardware (e.g. a larger page size in the page
entry
table) for the stack if it
knows upfront that more memory will be required.
|
This function was added in the QNX Neutrino Core OS 6.3.2. |
- EOK
- Success.
QNX Neutrino
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
Yes |
Thread |
Yes |
pthread_attr_getstackprealloc(),
pthread_attr_getstacksize(),
pthread_attr_init(),
pthread_create()
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