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some changes to mux handling in mod-sys.c

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This commit is contained in:
hyung-hwan 2020-02-04 09:59:08 +00:00
parent e2accffa0e
commit 292f2cc265
2 changed files with 115 additions and 92 deletions
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58
hawk/lib/hawk-utl.h
View File

@ -40,64 +40,6 @@
#define HAWK_EPOCH_MON_WIN (1)
#define HAWK_EPOCH_DAY_WIN (1)
/* =========================================================================
* DOUBLY LINKED LIST
* ========================================================================= */
#define HAWK_APPEND_TO_LIST(list, node) do { \
(node)->next = HAWK_NULL; \
(node)->prev = (list)->last; \
if ((list)->first) (list)->last->next = (node); \
else (list)->first = (node); \
(list)->last = (node); \
} while(0)
#define HAWK_PREPPEND_TO_LIST(list, node) do { \
(node)->prev = HAWK_NULL; \
(node)->next = (list)->first; \
if ((list)->last) (list)->first->prev = (node); \
else (list)->last = (node); \
(list)->first = (node); \
} while(0)
#define HAWK_DELETE_FROM_LIST(list, node) do { \
if ((node)->prev) (node)->prev->next = (node)->next; \
else (list)->first = (node)->next; \
if ((node)->next) (node)->next->prev = (node)->prev; \
else (list)->last = (node)->prev; \
} while(0)
#define HAWK_APPEND_TO_OOP_LIST(hawk, list, node_type, node, _link) do { \
(node)->_link.next = (node_type)(hawk)->_nil; \
(node)->_link.prev = (list)->last; \
if ((hawk_oop_t)(list)->last != (hawk)->_nil) (list)->last->_link.next = (node); \
else (list)->first = (node); \
(list)->last = (node); \
} while(0)
#define HAWK_PREPPEND_TO_OOP_LIST(hawk, list, node_type, node, _link) do { \
(node)->_link.prev = (node_type)(hawk)->_nil; \
(node)->_link.next = (list)->first; \
if ((hawk_oop_t)(list)->first != (hawk)->_nil) (list)->first->_link.prev = (node); \
else (list)->last = (node); \
(list)->first = (node); \
} while(0)
#define HAWK_DELETE_FROM_OOP_LIST(hawk, list, node, _link) do { \
if ((hawk_oop_t)(node)->_link.prev != (hawk)->_nil) (node)->_link.prev->_link.next = (node)->_link.next; \
else (list)->first = (node)->_link.next; \
if ((hawk_oop_t)(node)->_link.next != (hawk)->_nil) (node)->_link.next->_link.prev = (node)->_link.prev; \
else (list)->last = (node)->_link.prev; \
} while(0)
/*
#define HAWK_CLEANUP_FROM_OOP_LIST(hawk, list, node, _link) do { \
HAWK_DELETE_FROM_OOP_LIST (hawk, list, node, _link); \
(node)->_link.prev = (node_type)(hawk)->_nil; \
(node)->_link.next = (node_type)(hawk)->_nil; \
} while(0);
*/
/* =========================================================================
* ENDIAN CHANGE OF A CONSTANT
* ========================================================================= */

139
hawk/lib/mod-sys.c
View File

@ -116,28 +116,45 @@ enum sys_node_data_flag_t
};
typedef enum sys_node_data_flag_t sys_node_data_flag_t;
struct sys_node_data_file_t
{
int fd;
void* mux; /* if SYS_NODE_DATA_FLAG_IN_MUX is set, this is set to a valid pointer. it is of the void* type since sys_node_t is not available yet. */
void* x_prev;
void* x_next;
};
typedef struct sys_node_data_file_t sys_node_data_file_t;
struct sys_node_data_sck_t
{
int fd;
void* mux; /* if SYS_NODE_DATA_FLAG_IN_MUX is set, this is set to a valid pointer. it is of the void* type since sys_node_t is not available yet. */
void* x_prev;
void* x_next;
};
typedef struct sys_node_data_sck_t sys_node_data_sck_t;
struct sys_node_data_mux_t
{
#if defined(USE_EPOLL)
int fd;
#endif
void* x_first;
void* x_last;
};
typedef struct sys_node_data_mux_t sys_node_data_mux_t;
struct sys_node_data_t
{
sys_node_data_type_t type;
int flags;
void* extra; /* if SYS_NODE_DATA_FLAG_IN_MUX is set, this is set to a valid pointer. it is of the void* type since sys_node_t is not available yet. */
union
{
struct
{
int fd;
} file;
struct
{
int fd;
} sck;
sys_node_data_file_t file;
sys_node_data_sck_t sck;
hawk_dir_t* dir;
struct
{
#if defined(USE_EPOLL)
int fd;
#endif
} mux;
sys_node_data_mux_t mux;
} u;
};
typedef struct sys_node_data_t sys_node_data_t;
@ -260,6 +277,39 @@ static sys_node_t* new_sys_node_mux (hawk_rtx_t* rtx, sys_list_t* list, int fd)
return node;
}
static void chain_sys_node_to_mux_node (sys_node_t* mux_node, sys_node_t* node)
{
sys_node_data_mux_t* mux_data = &mux_node->ctx.u.mux;
sys_node_data_file_t* file_data = &node->ctx.u.file;
HAWK_ASSERT (!(node->ctx.flags & SYS_NODE_DATA_FLAG_IN_MUX));
node->ctx.flags |= SYS_NODE_DATA_FLAG_IN_MUX;
file_data->mux = mux_node;
file_data->x_prev = HAWK_NULL;
file_data->x_next = mux_data->x_first;
if (mux_data->x_first) ((sys_node_t*)mux_data->x_first)->ctx.u.file.x_prev = node;
else mux_data->x_last = node;
mux_data->x_first = node;
}
static void unchain_sys_node_from_mux_node (sys_node_t* mux_node, sys_node_t* node)
{
sys_node_data_mux_t* mux_data = &mux_node->ctx.u.mux;
sys_node_data_file_t* file_data = &node->ctx.u.file;
HAWK_ASSERT (node->ctx.flags & SYS_NODE_DATA_FLAG_IN_MUX);
node->ctx.flags &= ~SYS_NODE_DATA_FLAG_IN_MUX;
if (file_data->x_prev) ((sys_node_t*)file_data->x_prev)->ctx.u.file.x_next = file_data->x_next;
else mux_data->x_first = file_data->x_next;
if (file_data->x_next) ((sys_node_t*)file_data->x_next)->ctx.u.file.x_prev = file_data->x_prev;
else mux_data->x_last = file_data->x_prev;
file_data->mux = HAWK_NULL;
}
static void del_from_mux (hawk_rtx_t* rtx, sys_node_t* fd_node)
{
if (fd_node->ctx.flags & SYS_NODE_DATA_FLAG_IN_MUX)
@ -269,35 +319,37 @@ static void del_from_mux (hawk_rtx_t* rtx, sys_node_t* fd_node)
struct epoll_event ev;
#endif
mux_node = (sys_node_t*)fd_node->ctx.extra;
switch (fd_node->ctx.type)
{
case SYS_NODE_DATA_TYPE_FILE:
mux_node = (sys_node_t*)fd_node->ctx.u.file.mux;
#if defined(USE_EPOLL)
epoll_ctl (mux_node->ctx.u.mux.fd, EPOLL_CTL_DEL, fd_node->ctx.u.file.fd, &ev);
#endif
unchain_sys_node_from_mux_node (mux_node, fd_node);
break;
case SYS_NODE_DATA_TYPE_SCK:
mux_node = (sys_node_t*)fd_node->ctx.u.sck.mux;
#if defined(USE_EPOLL)
epoll_ctl (mux_node->ctx.u.mux.fd, EPOLL_CTL_DEL, fd_node->ctx.u.sck.fd, &ev);
#endif
unchain_sys_node_from_mux_node (mux_node, fd_node);
break;
default:
/* do nothing */
fd_node->ctx.flags &= ~SYS_NODE_DATA_FLAG_IN_MUX;
break;
}
fd_node->ctx.flags &= ~SYS_NODE_DATA_FLAG_IN_MUX;
fd_node->ctx.extra = HAWK_NULL;
}
}
static void purge_mux_members (hawk_rtx_t* rtx, sys_node_t* mux_node)
{
while (mux_node->ctx.extra)
while (mux_node->ctx.u.mux.x_first)
{
del_from_mux (rtx, mux_node->ctx.extra);
del_from_mux (rtx, mux_node->ctx.u.mux.x_first);
}
}
@ -707,7 +759,8 @@ static int fnc_dup (hawk_rtx_t* rtx, const hawk_fnc_info_t* fi)
}
#endif
sys_node2->ctx.u.file.fd = fd; /* dup2 or dup3 closes the descriptor implicitly */
/* dup2 or dup3 closes the descriptor sys_node2_.ctx.u.file.fd implicitly */
sys_node2->ctx.u.file.fd = fd;
rx = sys_node2->id;
}
else
@ -2840,15 +2893,33 @@ static HAWK_INLINE int ctl_epoll (hawk_rtx_t* rtx, const hawk_fnc_info_t* fi, in
ev.events = events;
ev.data.ptr = sys_node2;
if (sys_node2->ctx.flags & SYS_NODE_DATA_FLAG_IN_MUX)
{
/* in actual operating systems, a file descriptor can
* be watched under multiple I/O multiplexers. but this
* implementation only allows 1 multiplexer for each
* file descriptor for simplicity */
rx = set_error_on_sys_list(rtx, sys_list, HAWK_EPERM, HAWK_T("already in mux"));
goto done;
}
/* TODO: cmd == MOD, check if sys_node is equal to sys_node2->ctx.u.file.mux??? */
}
else
{
if (!(sys_node2->ctx.flags & SYS_NODE_DATA_FLAG_IN_MUX))
{
rx = set_error_on_sys_list(rtx, sys_list, HAWK_EPERM, HAWK_T("not in mux"));
goto done;
}
}
switch (sys_node2->ctx.type)
{
case SYS_NODE_DATA_TYPE_FILE:
evfd = sys_node2->ctx.u.file.fd;
break;
case SYS_NODE_DATA_TYPE_SCK:
evfd = sys_node2->ctx.u.sck.fd;
evfd = sys_node2->ctx.u.file.fd;
break;
default:
@ -2863,16 +2934,26 @@ static HAWK_INLINE int ctl_epoll (hawk_rtx_t* rtx, const hawk_fnc_info_t* fi, in
}
else
{
switch (sys_node2->ctx.type)
{
case SYS_NODE_DATA_TYPE_FILE:
case SYS_NODE_DATA_TYPE_SCK:
if (cmd != EPOLL_CTL_DEL)
{
sys_node2->ctx.flags |= SYS_NODE_DATA_FLAG_IN_MUX;
sys_node2->ctx.extra = sys_node;
chain_sys_node_to_mux_node (sys_node, sys_node2);
}
else
{
sys_node2->ctx.flags &= ~SYS_NODE_DATA_FLAG_IN_MUX;
sys_node2->ctx.extra = HAWK_NULL;
unchain_sys_node_from_mux_node(sys_node, sys_node2);
}
break;
default:
/* internal error */
rx = set_error_on_sys_list(rtx, sys_list, HAWK_EINTERN, HAWK_NULL);
goto done;
}
}
}
}