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AVR Libc AVRLibc

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2 Library Reference
AVR Libc Library Reference
2 <stdlib.h>: General utilities
2.5 Functions
2.5.14 void free
void free(void *__ptr)

AVRLibc

AVR Libc
1 User Manual
2 Library Reference
AVR Libc Library Reference
- 2 <alloca.h>: Allocate space in the stack
- 2 <assert.h>: Diagnostics
- 2 <avr/boot.h>: Bootloader Support Utilities
- 2 <avr/cpufunc.h>: Special AVR CPU functions
- 2 <avr/eeprom.h>: EEPROM handling
- 2 <avr/fuse.h>: Fuse Support
- 2 <avr/interrupt.h>: Interrupts
- 2 <avr/io.h>: AVR device-specific IO definitions
- 2 <avr/lock.h>: Lockbit Support
- 2 <avr/pgmspace.h>: Program Space Utilities
- 2 <avr/power.h>: Power Reduction Management
- 2 <avr/sfr_defs.h>: Special function registers
- 2 <avr/signature.h>: Signature Support
- 2 <avr/sleep.h>: Power Management and Sleep Modes
- 2 <avr/version.h>: avr-libc version macros
- 2 <avr/wdt.h>: Watchdog timer handling
- 2 <compat/deprecated.h>: Deprecated items
- 2 <compat/ina90.h>: Compatibility with IAR EWB 3.x
- 2 <ctype.h>: Character Operations
- 2 <errno.h>: System Errors
- 2 <inttypes.h>: Integer Type conversions
- 2 <math.h>: Mathematics
- 2 <setjmp.h>: Non-local goto
- 2 <stdint.h>: Standard Integer Types
- 2 <stdio.h>: Standard IO facilities
- 2 <stdlib.h>: General utilities
  - 2.1 Non-standard (i.e. non-ISO C) functions.
  - 2.2 Conversion functions for double arguments.
  - 2.3 Typedefs
  - 2.4 Variables
  - 2.5 Functions
    - 2.5.1 void abort
      void abort(void) __ATTR_NORETURN__
    - 2.5.2 int abs
      int abs(int __i)
    - 2.5.3 long labs
      long labs(long __i)
    - 2.5.4 void* bsearch
      void* bsearch(const void *__key, const void *__base, size_t __nmemb, size_t __size, int(*__compar)(const void *, const void *))
    - 2.5.5 div_t div
      div_t div(int __num, int __denom) __asm__("__divmodhi4")
    - 2.5.6 ldiv_t ldiv
      ldiv_t ldiv(long __num, long __denom) __asm__("__divmodsi4")
    - 2.5.7 void qsort
      void qsort(void *__base, size_t __nmemb, size_t __size, __compar_fn_t __compar)
    - 2.5.8 long strtol
      long strtol(const char *__nptr, char **__endptr, int __base)
    - 2.5.9 unsigned long strtoul
      unsigned long strtoul(const char *__nptr, char **__endptr, int __base)
    - 2.5.10 long atol
      long atol(const char *__s) __ATTR_PURE__
    - 2.5.11 int atoi
      int atoi(const char *__s) __ATTR_PURE__
    - 2.5.12 void exit
      void exit(int __status) __ATTR_NORETURN__
    - 2.5.13 void* malloc
      void* malloc(size_t __size) __ATTR_MALLOC__
    - 2.5.14 void free
      void free(void *__ptr)
    - 2.5.15 void* calloc
      void* calloc(size_t __nele, size_t __size) __ATTR_MALLOC__
    - 2.5.16 void* realloc
      void* realloc(void *__ptr, size_t __size) __ATTR_MALLOC__
    - 2.5.17 double strtod
      double strtod(const char *__nptr, char **__endptr)
    - 2.5.18 double atof
      double atof(const char *__nptr)
    - 2.5.19 int rand
      int rand(void)
    - 2.5.20 void srand
      void srand(unsigned int __seed)
    - 2.5.21 int rand_r
      int rand_r(unsigned long *__ctx)
  - 2.6 Defines
- 2 <string.h>: Strings
- 2 <time.h>: Time
- 2 <util/atomic.h> Atomically and Non-Atomically Executed Code Blocks
- 2 <util/crc16.h>: CRC Computations
- 2 <util/delay.h>: Convenience functions for busy-wait delay loops
- 2 <util/delay_basic.h>: Basic busy-wait delay loops
- 2 <util/parity.h>: Parity bit generation
- 2 <util/setbaud.h>: Helper macros for baud rate calculations
- 2 <util/twi.h>: TWI bit mask definitions
- 2.1 Structures
3 Example Projects
4 Files

2.5.14 void free

void free(void *__ptr)

The free() function causes the allocated memory referenced by ptr to be made available for future allocations. If ptr is NULL, no action occurs.

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