srn_mmap.c File Reference

#include "serene/utils/srn_mmap.h"
#include <sys/mman.h>
#include <unistd.h>
#include "serene/rt/context.h"
#include "serene/rt/errors.h"

Include dependency graph for srn_mmap.c:

Go to the source code of this file.

Functions
srn_error_t *	srn_mmap (srn_context_t *ctx, srn_mmap_buffer_t *out, size_t len, int prot, int flags, int fd, off64_t offset)
int	srn_munmap (srn_mmap_buffer_t *map)

Function Documentation

srn_mmap()

srn_error_t * srn_mmap	(	srn_context_t *	ctx,
		srn_mmap_buffer_t *	out,
		size_t	len,
		int	prot,
		int	flags,
		int	fd,
		off64_t	offset )

Definition at line 30 of file srn_mmap.c.

  {
  int mprot = PROT_READ;
  int mflag = 0;
 
  SRN_MMAP_VALIDATE(out, len, prot, flags);
 
  out->data = nullptr;
  out->len  = 0;
 
  if (prot & SRN_PROT_WRITE) {
    mprot |= PROT_WRITE;
  }
 
  if ((flags & SRN_MAP_TYPE) == SRN_MAP_SHARED) {
    mflag = MAP_SHARED;
  } else if ((flags & SRN_MAP_TYPE) == SRN_MAP_PRIVATE) {
    mflag = MAP_PRIVATE;
  } else {
    mflag = MAP_SHARED;
  }
 
  out->data = mmap(NULL, len, mprot, mflag, fd, offset);
 
  if (!out->data || out->data == MAP_FAILED) {
    auto err = ERR(ctx, MEMORY_MAP_FAILED, "failed to mmap. Could not write data");
    return err;
  }
 
  out->len = len;
 
  return nullptr;
}

srn_munmap()

int srn_munmap

(

srn_mmap_buffer_t *

map

)

Definition at line 66 of file srn_mmap.c.

                                       {
  PANIC_IF_NULL(map);
  munmap(map->data, map->len);
  map->data = NULL;
  map->len  = 0;
 
  return 0;
}