48c6bb79f4
SYSLIB CHANGES: - DS calls to publish / retrieve labels consider endpoints instead of u32_t. VFS CHANGES: - mapdriver() only adds an entry in the dmap table in VFS. - dev_up() is only executed upon reception of a driver up event. INET CHANGES: - INET no longer searches for existing drivers instances at startup. - A newtwork driver is (re)initialized upon reception of a driver up event. - Networking startup is now race-free by design. No need to waste 5 seconds at startup any more. DRIVER CHANGES: - Every driver publishes driver up events when starting for the first time or in case of restart when recovery actions must be taken in the upper layers. - Driver up events are published by drivers through DS. - For regular drivers, VFS is normally the only subscriber, but not necessarily. For instance, when the filter driver is in use, it must subscribe to driver up events to initiate recovery. - For network drivers, inet is the only subscriber for now. - Every VFS driver is statically linked with libdriver, every network driver is statically linked with libnetdriver. DRIVER LIBRARIES CHANGES: - Libdriver is extended to provide generic receive() and ds_publish() interfaces for VFS drivers. - driver_receive() is a wrapper for sef_receive() also used in driver_task() to discard spurious messages that were meant to be delivered to a previous version of the driver. - driver_receive_mq() is the same as driver_receive() but integrates support for queued messages. - driver_announce() publishes a driver up event for VFS drivers and marks the driver as initialized and expecting a DEV_OPEN message. - Libnetdriver is introduced to provide similar receive() and ds_publish() interfaces for network drivers (netdriver_announce() and netdriver_receive()). - Network drivers all support live update with no state transfer now. KERNEL CHANGES: - Added kernel call statectl for state management. Used by driver_announce() to unblock eventual callers sendrecing to the driver.
94 lines
2.1 KiB
C
94 lines
2.1 KiB
C
#include "inc.h"
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char *key_u32 = "test_u32";
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/* SEF functions and variables. */
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FORWARD _PROTOTYPE( void sef_local_startup, (void) );
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/*===========================================================================*
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* main *
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*===========================================================================*/
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int main(void)
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{
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int r;
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message mess;
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char key[DS_MAX_KEYLEN];
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int type;
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unsigned long num;
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char string[17];
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char buf[1000];
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size_t length = 1000;
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/* SEF local startup. */
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sef_local_startup();
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/* Subscribe. */
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r = ds_subscribe(key_u32, DSF_INITIAL);
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if(r != OK && r != EEXIST) {
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printf("SUBSCRIBER: error in ds_subscribe: %d\n", r);
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return -1;
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}
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while(1) {
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/* Wait for a message. */
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r = sef_receive(ANY, &mess);
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if(r != OK) {
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printf("SUBSCRIBER: sef_receive failed.\n");
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return 1;
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}
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/* Only handle notifications from DS. */
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if(mess.m_source != DS_PROC_NR)
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continue;
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/* Check which one was changed. */
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r = ds_check(key, &type, NULL);
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if(r == ENOENT) {
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printf("SUBSCRIBER: the key %s was deleted.\n",
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key);
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continue;
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}
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if(r != OK) {
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printf("SUBSCRIBER: error in ds_check.\n");
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continue;
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}
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/* Retrieve the entry. */
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printf("SUBSCRIBER: key: %s, ", key);
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switch(type) {
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case DSF_TYPE_U32:
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r = ds_retrieve_u32(key, &num);
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if(r != OK)
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printf("error in ds_retrieve_u32.\n");
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printf("U32: %d\n", num);
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break;
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case DSF_TYPE_STR:
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r = ds_retrieve_str(key, string, sizeof(string)-1);
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if(r != OK)
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printf("error in ds_retrieve_str.\n");
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printf("STR: %s\n", string);
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break;
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case DSF_TYPE_MEM:
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r = ds_retrieve_mem(key, buf, &length);
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if(r != OK)
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printf("error in ds_retrieve_mem.\n");
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break;
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case DSF_TYPE_MAP:
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break;
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default:
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printf("error in type! %d\n", type);
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}
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}
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return 0;
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}
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/*===========================================================================*
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* sef_local_startup *
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*===========================================================================*/
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PRIVATE void sef_local_startup()
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{
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/* Let SEF perform startup. */
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sef_startup();
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}
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