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Deallocate a block of memory
#include <malloc.h>
void _sfree( void *ptr,
size_t size );
- ptr
- NULL, or a pointer to the block of memory that you want
to free.
- size
- The number of bytes to deallocate.
libc
Use the -l c option to
qcc
to link against this library.
This library is usually included automatically.
|
This function is in libc.a, but not in libc.so
(in order to save space). |
When the value of the argument ptr is NULL,
the _sfree() function does nothing; otherwise, the
_sfree() function deallocates size bytes of memory
located by the argument ptr, which was previously returned by a
call to the appropriate version of
_scalloc() or
_smalloc().
After the call, the freed block is available for allocation.
QNX Neutrino
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
Yes |
Thread |
Yes |
Calling _sfree() on a pointer already deallocated by a call to
_sfree() could corrupt the memory allocator's data structures.
The size must match the size of the allocated block.
calloc(),
free(),
realloc(),
_scalloc(),
_smalloc(),
_srealloc()
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