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pang-io: rework api for memory-mapped io

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On real hardwareit will use memory-mapped io.  Rework pang-io so that it
more closely aligns with this paradigm.

Signed-off-by: Sean Cross <sean@xobs.io>
This commit is contained in:
Sean Cross
2019-06-12 18:22:12 +08:00
parent 03e268f710
commit aa387e176d
7 changed files with 70 additions and 49 deletions
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5
include/fat12.h
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@ -3,6 +3,7 @@
#include <stdint.h>
struct pang_io;
struct fat12_partition;
struct fat12_dirent {
char filename[256];
@ -29,7 +30,7 @@ uint32_t fat12_read_u32(void *ptr);
void fat12_set_cluster(void *fat, uint32_t cluster, uint32_t value);
uint32_t fat12_get_cluster(void *fat, uint32_t cluster);
int fat12_defrag(int fd);
int fat12_mkfs(int fd, uint32_t bytes);
int fat12_defrag(struct pang_io *io);
int fat12_mkfs(struct pang_io *io, uint32_t bytes);
#endif /* PANG_O_LIN_FAT12_H__ */

11
include/io.h
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@ -11,10 +11,11 @@
#include <unistd.h>
#endif
ssize_t pang_write(int fd, const void *buf, size_t count);
ssize_t pang_read(int fd, void *buf, size_t count);
off_t pang_seek(int fd, off_t offset, int whence);
int pang_open(const char *pathname, int flags);
int pang_close(int fd);
struct pang_io;
ssize_t pang_write(struct pang_io *io, off_t offset, const void *buf, size_t count);
ssize_t pang_read(struct pang_io *io, off_t offset, void *buf, size_t count);
struct pang_io *pang_open(const char *pathname);
int pang_close(struct pang_io **io);
#endif /* PANG_O_LIN_IO_H__ */