c5b309ff07
Main changes: - COW optimization for safecopy. - safemap, a grant-based interface for sharing memory regions between processes. - Integration with safemap and complete rework of DS, supporting new data types natively (labels, memory ranges, memory mapped ranges). - For further information: http://wiki.minix3.org/en/SummerOfCode2009/MemoryGrants Additional changes not included in the original Wu's branch: - Fixed unhandled case in VM when using COW optimization for safecopy in case of a block that has already been shared as SMAP. - Better interface and naming scheme for sys_saferevmap and ds_retrieve_map calls. - Better input checking in syslib: check for page alignment when creating memory mapping grants. - DS notifies subscribers when an entry is deleted. - Documented the behavior of indirect grants in case of memory mapping. - Test suite in /usr/src/test/safeperf|safecopy|safemap|ds/* reworked and extended. - Minor fixes and general cleanup. - TO-DO: Grant ids should be generated and managed the way endpoints are to make sure grant slots are never misreused.
94 lines
2 KiB
C
94 lines
2 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);
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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, 0);
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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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