lby/mkrtos-real
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增加fd映射层

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This commit is contained in:
zhangzheng
2023-11-18 23:31:00 +08:00
parent 97b4651f31
commit 1e384bee71
18 changed files with 146 additions and 31 deletions
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29
mkrtos_user/lib/libc_backend/src/fd_map.c
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@@ -4,12 +4,8 @@
#include <malloc.h>
#include <errno.h>
#include <pthread.h>
typedef struct fd_map_entry
{
uint16_t svr_fd;
uint16_t priv_fd;
uint8_t flags;
} fd_map_entry_t;
#include <fd_map.h>
#include <string.h>
#define FD_MAP_ROW_CN 16
#define FD_MAP_ROW_NR 16
@@ -30,7 +26,7 @@ typedef struct fd_map
static fd_map_t fd_map;
int fd_map_alloc(uint16_t svr_fd, uint16_t priv_fd)
int fd_map_alloc(uint16_t svr_fd, uint16_t priv_fd, enum fd_type type)
{
int alloc_fd = 0;
@@ -71,16 +67,31 @@ next:;
pthread_spin_unlock(&fd_map.lock);
return -EAGAIN;
}
memset(fd_map.row[row_inx], 0, sizeof(fd_map_row_t));
}
assert(fd_map.row[row_inx]->entry[inx].flags == 0);
fd_map.row[row_inx]->entry[inx].flags = 1;
fd_map.row[row_inx]->entry[inx].svr_fd = svr_fd;
fd_map.row[row_inx]->entry[inx].priv_fd = priv_fd;
fd_map.row[row_inx]->entry[inx].type = type;
fd_map.free_fd++;
pthread_spin_unlock(&fd_map.lock);
return alloc_fd;
}
int fd_map_get(int fd, fd_map_entry_t *new_entry)
{
assert(new_entry);
if (fd >= FD_MAP_TOTAL)
{
return -1;
}
int row_inx = fd / FD_MAP_ROW_CN;
int inx = fd % FD_MAP_ROW_CN;
*new_entry = fd_map.row[row_inx]->entry[inx];
return 0;
}
int fd_map_update(int fd, fd_map_entry_t *new_entry)
{
if (fd >= FD_MAP_TOTAL)
@@ -115,6 +126,10 @@ int fd_map_free(int fd, fd_map_entry_t *ret_entry)
*ret_entry = fd_map.row[row_inx]->entry[inx];
}
fd_map.row[row_inx]->entry[inx].flags = 0;
if (fd_map.free_fd > fd)
{
fd_map.free_fd = fd;
}
pthread_spin_unlock(&fd_map.lock);
}
else