src/platform/shm.h

#ifndef SHM_H
#define SHM_H
 
#include <stddef.h>
 
/*
 * POSIX/memfd shared-memory mapping (internal).
 *
 * Wayland wl_shm buffers and X11 MIT-SHM use this. The fd is given to
 * the compositor/X; *outMapped is the CPU pointer. After a successful
 * pool/attach you can close the fd and keep the map (see wayland.c).
 */
 
/* Create a size-byte map. Returns fd >= 0, or -1. */
int shm_alloc(size_t size, void **outMapped);
 
/* munmap + close(fd) if fd >= 0. mapped may be NULL. */
void shm_free(int fileDescriptor, void *mapped, size_t size);
 
#endif