From 8a6d48c0542876eb3acfc0970c0ab7872db08d5f Mon Sep 17 00:00:00 2001
From: Zheng Da <zhengda1936@gmail.com>
Date: Sun, 6 Dec 2009 05:26:23 +0100
Subject: check in the original version of dde linux26.

---
 libdde_linux26/contrib/include/linux/poll.h | 136 ++++++++++++++++++++++++++++
 1 file changed, 136 insertions(+)
 create mode 100644 libdde_linux26/contrib/include/linux/poll.h

(limited to 'libdde_linux26/contrib/include/linux/poll.h')

diff --git a/libdde_linux26/contrib/include/linux/poll.h b/libdde_linux26/contrib/include/linux/poll.h
new file mode 100644
index 00000000..8c24ef8d
--- /dev/null
+++ b/libdde_linux26/contrib/include/linux/poll.h
@@ -0,0 +1,136 @@
+#ifndef _LINUX_POLL_H
+#define _LINUX_POLL_H
+
+#include <asm/poll.h>
+
+#ifdef __KERNEL__
+
+#include <linux/compiler.h>
+#include <linux/wait.h>
+#include <linux/string.h>
+#include <linux/fs.h>
+#include <linux/sched.h>
+#include <asm/uaccess.h>
+
+/* ~832 bytes of stack space used max in sys_select/sys_poll before allocating
+   additional memory. */
+#define MAX_STACK_ALLOC 832
+#define FRONTEND_STACK_ALLOC	256
+#define SELECT_STACK_ALLOC	FRONTEND_STACK_ALLOC
+#define POLL_STACK_ALLOC	FRONTEND_STACK_ALLOC
+#define WQUEUES_STACK_ALLOC	(MAX_STACK_ALLOC - FRONTEND_STACK_ALLOC)
+#define N_INLINE_POLL_ENTRIES	(WQUEUES_STACK_ALLOC / sizeof(struct poll_table_entry))
+
+#define DEFAULT_POLLMASK (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)
+
+struct poll_table_struct;
+
+/* 
+ * structures and helpers for f_op->poll implementations
+ */
+typedef void (*poll_queue_proc)(struct file *, wait_queue_head_t *, struct poll_table_struct *);
+
+typedef struct poll_table_struct {
+	poll_queue_proc qproc;
+} poll_table;
+
+static inline void poll_wait(struct file * filp, wait_queue_head_t * wait_address, poll_table *p)
+{
+	if (p && wait_address)
+		p->qproc(filp, wait_address, p);
+}
+
+static inline void init_poll_funcptr(poll_table *pt, poll_queue_proc qproc)
+{
+	pt->qproc = qproc;
+}
+
+struct poll_table_entry {
+	struct file *filp;
+	wait_queue_t wait;
+	wait_queue_head_t *wait_address;
+};
+
+/*
+ * Structures and helpers for sys_poll/sys_poll
+ */
+struct poll_wqueues {
+	poll_table pt;
+	struct poll_table_page *table;
+	struct task_struct *polling_task;
+	int triggered;
+	int error;
+	int inline_index;
+	struct poll_table_entry inline_entries[N_INLINE_POLL_ENTRIES];
+};
+
+extern void poll_initwait(struct poll_wqueues *pwq);
+extern void poll_freewait(struct poll_wqueues *pwq);
+extern int poll_schedule_timeout(struct poll_wqueues *pwq, int state,
+				 ktime_t *expires, unsigned long slack);
+
+static inline int poll_schedule(struct poll_wqueues *pwq, int state)
+{
+	return poll_schedule_timeout(pwq, state, NULL, 0);
+}
+
+/*
+ * Scaleable version of the fd_set.
+ */
+
+typedef struct {
+	unsigned long *in, *out, *ex;
+	unsigned long *res_in, *res_out, *res_ex;
+} fd_set_bits;
+
+/*
+ * How many longwords for "nr" bits?
+ */
+#define FDS_BITPERLONG	(8*sizeof(long))
+#define FDS_LONGS(nr)	(((nr)+FDS_BITPERLONG-1)/FDS_BITPERLONG)
+#define FDS_BYTES(nr)	(FDS_LONGS(nr)*sizeof(long))
+
+/*
+ * We do a VERIFY_WRITE here even though we are only reading this time:
+ * we'll write to it eventually..
+ *
+ * Use "unsigned long" accesses to let user-mode fd_set's be long-aligned.
+ */
+static inline
+int get_fd_set(unsigned long nr, void __user *ufdset, unsigned long *fdset)
+{
+	nr = FDS_BYTES(nr);
+	if (ufdset)
+		return copy_from_user(fdset, ufdset, nr) ? -EFAULT : 0;
+
+	memset(fdset, 0, nr);
+	return 0;
+}
+
+static inline unsigned long __must_check
+set_fd_set(unsigned long nr, void __user *ufdset, unsigned long *fdset)
+{
+	if (ufdset)
+		return __copy_to_user(ufdset, fdset, FDS_BYTES(nr));
+	return 0;
+}
+
+static inline
+void zero_fd_set(unsigned long nr, unsigned long *fdset)
+{
+	memset(fdset, 0, FDS_BYTES(nr));
+}
+
+#define MAX_INT64_SECONDS (((s64)(~((u64)0)>>1)/HZ)-1)
+
+extern int do_select(int n, fd_set_bits *fds, struct timespec *end_time);
+extern int do_sys_poll(struct pollfd __user * ufds, unsigned int nfds,
+		       struct timespec *end_time);
+extern int core_sys_select(int n, fd_set __user *inp, fd_set __user *outp,
+			   fd_set __user *exp, struct timespec *end_time);
+
+extern int poll_select_set_timeout(struct timespec *to, long sec, long nsec);
+
+#endif /* KERNEL */
+
+#endif /* _LINUX_POLL_H */
-- 
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