|This version of this document is no longer maintained. For the latest documentation, see http://www.qnx.com/developers/docs.|
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);
- 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().
- The amount of stack you want to preallocate for new threads.
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.|