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. DS understands publishing and subscribing where keys are in string

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form. Subscriptions are regular expressions.
 . different types are stored per key; currently u32 and/or string.
   the same key can be referenced (publish, subscribe, check) as any type.
 . notify()s are sent when subscriptions are triggered (publishing or
   updating of matching keys); optionally, a subscribe flag sends
   updates for all matching keys at subscription time, instead of only
   after updates after subscribing
 . all interfacing to ds is in /usr/src/lib/syslib/ds.c.
 . subscribe is ds_subscribe
   publish functions are ds_publish_<type>
   retrieve functions are ds_retrieve_<type> (one-time retrieval of a value)
   check functions are ds_check_<type> (check for updated key caller
      subscribes to not yet checked for, or ESRCH for none)
 . ramdisk driver updated with new ds interface
This commit is contained in:
Ben Gras
2006-07-13 14:50:23 +00:00
parent d40007667c
commit 3512a86b44
11 changed files with 642 additions and 91 deletions
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25
drivers/memory/memory.c
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@@ -17,10 +17,14 @@
#include "../drivers.h"
#include "../libdriver/driver.h"
#include <sys/ioc_memory.h>
#include <minix/ds.h>
#include "../../kernel/const.h"
#include "../../kernel/config.h"
#include "../../kernel/type.h"
#define MY_DS_NAME_BASE "dev:memory:ramdisk_base"
#define MY_DS_NAME_SIZE "dev:memory:ramdisk_size"
#include <sys/vm.h>
#include "assert.h"
@@ -291,8 +295,8 @@ message *m_ptr;
PRIVATE void m_init()
{
/* Initialize this task. All minor devices are initialized one by one. */
phys_bytes ramdev_size;
phys_bytes ramdev_base;
u32_t ramdev_size;
u32_t ramdev_base;
message m;
int i, s;
@@ -319,10 +323,8 @@ PRIVATE void m_init()
}
/* See if there are already RAM disk details at the Data Store server. */
m.DS_KEY = MEMORY_MAJOR;
if (OK == (s = _taskcall(DS_PROC_NR, DS_RETRIEVE, &m))) {
ramdev_size = m.DS_VAL_L1;
ramdev_base = m.DS_VAL_L2;
if(ds_retrieve_u32(MY_DS_NAME_BASE, &ramdev_base) == OK &&
ds_retrieve_u32(MY_DS_NAME_SIZE, &ramdev_size) == OK) {
printf("MEM retrieved size %u and base %u from DS, status %d\n",
ramdev_size, ramdev_base, s);
if (OK != (s=sys_segctl(&m_seg[RAM_DEV], (u16_t *) &s,
@@ -423,15 +425,14 @@ int safe;
/* Store the values we got in the data store so we can retrieve
* them later on, in the unfortunate event of a crash.
*/
m.DS_KEY = MEMORY_MAJOR;
m.DS_VAL_L1 = ramdev_size;
m.DS_VAL_L2 = ramdev_base;
if (OK != (s = _taskcall(DS_PROC_NR, DS_PUBLISH, &m))) {
if(ds_publish_u32(MY_DS_NAME_BASE, ramdev_base) != OK ||
ds_publish_u32(MY_DS_NAME_SIZE, ramdev_size) != OK) {
panic("MEM","Couldn't store RAM disk details at DS.",s);
}
#if DEBUG
printf("MEM stored size %u and base %u at DS, status %d\n",
ramdev_size, ramdev_base, s);
printf("MEM stored size %u and base %u at DS, names %s and %s\n",
ramdev_size, ramdev_base, MY_DS_NAME_BASE, MY_DS_NAME_SIZE);
#endif
if (OK != (s=sys_segctl(&m_seg[RAM_DEV], (u16_t *) &s,