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Robert NishiharaandStephanie Wang
d77b685a90
* Initial scheduler commit * global scheduler * add global scheduler * Implement global scheduler skeleton. * Formatting. * Allow local scheduler to be started without a connection to redis so that we can test it without a global scheduler. * Fail if there are no local schedulers when the global scheduler receives a task. * Initialize uninitialized value and formatting fix. * Generalize local scheduler table to db client table. * Remove code duplication in local scheduler and add flag for whether a task came from the global scheduler or not. * Queue task specs in the local scheduler instead of tasks. * Simple global scheduler tests, including valgrind. * Factor out functions for starting processes. * Fixes.
52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
#include "common.h"
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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/* This is used to define the array of object IDs. */
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const UT_icd object_id_icd = {sizeof(object_id), NULL, NULL, NULL};
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const unique_id NIL_ID = {{255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
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255, 255, 255, 255, 255, 255, 255, 255, 255, 255}};
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unique_id globally_unique_id(void) {
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/* Use /dev/urandom for "real" randomness. */
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int fd;
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if ((fd = open("/dev/urandom", O_RDONLY)) == -1) {
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LOG_ERROR("Could not generate random number");
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}
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unique_id result;
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read(fd, &result.id[0], UNIQUE_ID_SIZE);
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close(fd);
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return result;
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}
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bool object_ids_equal(object_id first_id, object_id second_id) {
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return UNIQUE_ID_EQ(first_id, second_id);
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}
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bool object_id_is_nil(object_id id) {
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return object_ids_equal(id, NIL_OBJECT_ID);
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}
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bool db_client_ids_equal(db_client_id first_id, db_client_id second_id) {
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return UNIQUE_ID_EQ(first_id, second_id);
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}
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char *sha1_to_hex(const unsigned char *sha1, char *buffer) {
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static const char hex[] = "0123456789abcdef";
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char *buf = buffer;
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for (int i = 0; i < UNIQUE_ID_SIZE; i++) {
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unsigned int val = *sha1++;
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*buf++ = hex[val >> 4];
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*buf++ = hex[val & 0xf];
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}
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*buf = '\0';
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return buffer;
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}
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