Malloc, Synopsis, Returns – Zilog ZUSBOPTS User Manual
Page 454: Example
Standard Functions
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Zilog Developer Studio II – ZNEO™
User Manual
Synopsis
#include
void longjmp(jmp_buf env, int val);
Returns
After
longjmp
is completed, program execution continues as if the corresponding call to
setjmp
had just returned the value specified by
val
. The
longjmp
function cannot cause
setjmp
to return the value 0; if val is 0,
setjmp
returns the value 1.
Example
int i;
jmp_buf env;
i=setjmp(env);
longjmp(env,i);
malloc
Allocates space for an object whose size is specified by size.
The existing implementation of
malloc()
depends on the heap area being located from
the bottom of the heap (referred to by the symbol __heapbot) to the top of the stack (SP).
Care must be taken to avoid holes in this memory range. Otherwise, the
malloc()
func-
tion might not be able to allocate a valid memory object.
Synopsis
#include
void *malloc(size_t size);
Returns
A pointer to the start (lowest byte address) of the allocated space. If the space cannot be
allocated, or if size is zero, the
malloc
function returns a null pointer.
Example
char *buf;
buf=(char *) malloc(40*sizeof(char));
if(buf !=NULL)
/*success*/
else
/*fail*/
Note: