varun-r-mallya/sysprof
1
0
Fork 0
mirror of https://github.com/varun-r-mallya/sysprof.git synced 2026-02-12 08:00:53 +00:00
Code Issues Packages Projects Releases Wiki Activity

Remove left over debug print out and add support for multiple clients

Browse Source 
2005-12-20  Kristian Høgsberg  <krh@redhat.com>

        * module/sysprof-module.c: Remove left over debug print out and
        add support for multiple clients (readers).
This commit is contained in:
Kristian Høgsberg
2005-12-20 22:45:34 +00:00
committed by Kristian Høgsberg
parent acc0ee9ec9
commit 3c8bde00b4
2 changed files with 20 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
ChangeLog
View File

@ -1,7 +1,7 @@
2005-12-20 Kristian Høgsberg <krh@redhat.com> 2005-12-20 Kristian Høgsberg <krh@redhat.com>
* module/sysprof-module.c (sysprof_read): Remove left over debug * module/sysprof-module.c: Remove left over debug print out and
print out. add support for multiple clients (readers).
Tue Dec 20 16:03:29 2005 Soeren Sandmann <sandmann@redhat.com> Tue Dec 20 16:03:29 2005 Soeren Sandmann <sandmann@redhat.com>

25
module/sysprof-module.c
View File

@ -51,9 +51,9 @@ MODULE_AUTHOR("Soeren Sandmann (sandmann@daimi.au.dk)");
static SysprofStackTrace stack_traces[N_TRACES]; static SysprofStackTrace stack_traces[N_TRACES];
static SysprofStackTrace * head = &stack_traces[0]; static SysprofStackTrace * head = &stack_traces[0];
static SysprofStackTrace * tail = &stack_traces[0]; static atomic_t client_count = ATOMIC_INIT(0);
DECLARE_WAIT_QUEUE_HEAD (wait_for_trace); DECLARE_WAIT_QUEUE_HEAD (wait_for_trace);
DECLARE_WAIT_QUEUE_HEAD (wait_for_exit);
/* Macro the names of the registers that are used on each architecture */ /* Macro the names of the registers that are used on each architecture */
#if defined(CONFIG_X86_64) #if defined(CONFIG_X86_64)
@ -170,6 +170,7 @@ static int
sysprof_read(struct file *file, char *buffer, size_t count, loff_t *offset) sysprof_read(struct file *file, char *buffer, size_t count, loff_t *offset)
{ {
SysprofStackTrace *trace; SysprofStackTrace *trace;
SysprofStackTrace *tail = file->private_data;
if (count < sizeof *tail) if (count < sizeof *tail)
return -EMSGSIZE; return -EMSGSIZE;
@ -184,16 +185,20 @@ sysprof_read(struct file *file, char *buffer, size_t count, loff_t *offset)
if (copy_to_user(buffer, tail, sizeof *tail)) if (copy_to_user(buffer, tail, sizeof *tail))
return -EFAULT; return -EFAULT;
file->private_data = tail;
return sizeof *tail; return sizeof *tail;
} }
static unsigned int static unsigned int
sysprof_poll(struct file *filp, poll_table *poll_table) sysprof_poll(struct file *file, poll_table *poll_table)
{ {
SysprofStackTrace *tail = file->private_data;
if (head != tail) if (head != tail)
return POLLIN | POLLRDNORM; return POLLIN | POLLRDNORM;
poll_wait(filp, &wait_for_trace, poll_table); poll_wait(file, &wait_for_trace, poll_table);
if (head != tail) if (head != tail)
return POLLIN | POLLRDNORM; return POLLIN | POLLRDNORM;
@ -204,15 +209,21 @@ sysprof_poll(struct file *filp, poll_table *poll_table)
static int static int
sysprof_open(struct inode *inode, struct file *file) sysprof_open(struct inode *inode, struct file *file)
{ {
register_timer_hook (timer_notify); int retval;
if (atomic_inc_return(&client_count) == 1)
retval = register_timer_hook (timer_notify);
file->private_data = head;
return 0; return retval;
} }
static int static int
sysprof_release(struct inode *inode, struct file *file) sysprof_release(struct inode *inode, struct file *file)
{ {
unregister_timer_hook (timer_notify); if (atomic_dec_return(&client_count) == 0)
unregister_timer_hook (timer_notify);
return 0; return 0;
} }