Zilog ZUSBOPTS Manual de usuario descargar pdf (Pagina 454)

100

101

Standard Functions UM017105-0511

426

Zilog Developer Studio II – ZNEO™

User Manual

Synopsis

#include <setjmp.h>

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 <stdlib.h>

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:

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