pSOSystem System Calls - Read

pREPC+ System Calls realloc
realloc Allocates memory.
#include
void *realloc(
void *ptr, /* pointer */
size_t size /* new size */
)
Description
Arguments
Return Value
Error Codes
The realloc() function changes the size of the object pointed to by ptr to the size
specified by size. The contents of the object remain unchanged up to the lesser of
the new or old sizes. If the new size is larger, the value of the newly allocated portion
of the object is indeterminate.
The caller can be blocked if memory is not available and the wait option is selected
in the pREPC+ Configuration Table.
ptr Points to the object whose size is to be changed.
If ptr is a null pointer, realloc() behaves like malloc(). If ptr
does not match a segment previously returned by calloc(),
malloc() or realloc(), the result is unpredictable. If ptr is not a
null pointer and size is 0, the segment is deallocated.
size Specifies the new size of the object.
This function returns a pointer to the possibly moved allocated memory or a null
pointer. If an error occurs, errno is set.
Refer to Appendix B.
pSOSystem System Calls 3-123
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