src/include/stdlib.h

   1 #ifndef STDLIB_H
   2 #define STDLIB_H
   3
   4 FILE_LICENCE ( GPL2_OR_LATER );
   5
   6 #include <stdint.h>
   7 #include <assert.h>
   8
   9 /*****************************************************************************
  10  *
  11  * Numeric parsing
  12  *
  13  ****************************************************************************
  14  */
  15
  16 extern unsigned long strtoul ( const char *p, char **endp, int base );
  17
  18 /*****************************************************************************
  19  *
  20  * Memory allocation
  21  *
  22  ****************************************************************************
  23  */
  24
  25 extern void * __malloc malloc ( size_t size );
  26 extern void * realloc ( void *old_ptr, size_t new_size );
  27 extern void free ( void *ptr );
  28 extern void * __malloc zalloc ( size_t len );
  29
  30 /**
  31  * Allocate cleared memory
  32  *
  33  * @v nmemb             Number of members
  34  * @v size              Size of each member
  35  * @ret ptr             Allocated memory
  36  *
  37  * Allocate memory as per malloc(), and zero it.
  38  *
  39  * This is implemented as a static inline, with the body of the
  40  * function in zalloc(), since in most cases @c nmemb will be 1 and
  41  * doing the multiply is just wasteful.
  42  */
  43 static inline void * __malloc calloc ( size_t nmemb, size_t size ) {
  44         return zalloc ( nmemb * size );
  45 }
  46
  47 /*****************************************************************************
  48  *
  49  * Random number generation
  50  *
  51  ****************************************************************************
  52  */
  53
  54 extern long int random ( void );
  55 extern void srandom ( unsigned int seed );
  56
  57 static inline int rand ( void ) {
  58         return random();
  59 }
  60
  61 static inline void srand ( unsigned int seed ) {
  62         srandom ( seed );
  63 }
  64
  65 /*****************************************************************************
  66  *
  67  * Miscellaneous
  68  *
  69  ****************************************************************************
  70  */
  71
  72 extern int system ( const char *command );
  73 extern __asmcall int main ( void );
  74
  75 #endif /* STDLIB_H */