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/* This module contains four tests :
* 1- test.sanity : Basic tests for argument validation mostly.
* 2- test.sendbytes : Creates a pipe and registers its fds to the event loop,
* one end of the pipe for read events and the other end for
* the write events. On writable event, data is written. On
* readable event data is read. Repeated until all data is
* received.
* 3- test.iteration : A test for BEFORE_SLEEP and AFTER_SLEEP callbacks.
* Counters are incremented each time these events are
* fired. They should be equal and increment monotonically.
* 4- test.oneshot : Test for oneshot API
*/
#include "redismodule.h"
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <memory.h>
#include <errno.h>
int fds[2];
long long buf_size;
char *src;
long long src_offset;
char *dst;
long long dst_offset;
RedisModuleBlockedClient *bc;
RedisModuleCtx *reply_ctx;
void onReadable(int fd, void *user_data, int mask) {
REDISMODULE_NOT_USED(mask);
RedisModule_Assert(strcmp(user_data, "userdataread") == 0);
while (1) {
int rd = read(fd, dst + dst_offset, buf_size - dst_offset);
if (rd <= 0)
return;
dst_offset += rd;
/* Received all bytes */
if (dst_offset == buf_size) {
if (memcmp(src, dst, buf_size) == 0)
RedisModule_ReplyWithSimpleString(reply_ctx, "OK");
else
RedisModule_ReplyWithError(reply_ctx, "ERR bytes mismatch");
RedisModule_EventLoopDel(fds[0], REDISMODULE_EVENTLOOP_READABLE);
RedisModule_EventLoopDel(fds[1], REDISMODULE_EVENTLOOP_WRITABLE);
RedisModule_Free(src);
RedisModule_Free(dst);
close(fds[0]);
close(fds[1]);
RedisModule_FreeThreadSafeContext(reply_ctx);
RedisModule_UnblockClient(bc, NULL);
return;
}
};
}
void onWritable(int fd, void *user_data, int mask) {
REDISMODULE_NOT_USED(user_data);
REDISMODULE_NOT_USED(mask);
RedisModule_Assert(strcmp(user_data, "userdatawrite") == 0);
while (1) {
/* Check if we sent all data */
if (src_offset >= buf_size)
return;
int written = write(fd, src + src_offset, buf_size - src_offset);
if (written <= 0) {
return;
}
src_offset += written;
};
}
/* Create a pipe(), register pipe fds to the event loop and send/receive data
* using them. */
int sendbytes(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
if (argc != 2) {
RedisModule_WrongArity(ctx);
return REDISMODULE_OK;
}
if (RedisModule_StringToLongLong(argv[1], &buf_size) != REDISMODULE_OK ||
buf_size == 0) {
RedisModule_ReplyWithError(ctx, "Invalid integer value");
return REDISMODULE_OK;
}
bc = RedisModule_BlockClient(ctx, NULL, NULL, NULL, 0);
reply_ctx = RedisModule_GetThreadSafeContext(bc);
/* Allocate source buffer and write some random data */
src = RedisModule_Calloc(1,buf_size);
src_offset = 0;
memset(src, rand() % 0xFF, buf_size);
memcpy(src, "randomtestdata", strlen("randomtestdata"));
dst = RedisModule_Calloc(1,buf_size);
dst_offset = 0;
/* Create a pipe and register it to the event loop. */
if (pipe(fds) < 0) return REDISMODULE_ERR;
if (fcntl(fds[0], F_SETFL, O_NONBLOCK) < 0) return REDISMODULE_ERR;
if (fcntl(fds[1], F_SETFL, O_NONBLOCK) < 0) return REDISMODULE_ERR;
if (RedisModule_EventLoopAdd(fds[0], REDISMODULE_EVENTLOOP_READABLE,
onReadable, "userdataread") != REDISMODULE_OK) return REDISMODULE_ERR;
if (RedisModule_EventLoopAdd(fds[1], REDISMODULE_EVENTLOOP_WRITABLE,
onWritable, "userdatawrite") != REDISMODULE_OK) return REDISMODULE_ERR;
return REDISMODULE_OK;
}
int sanity(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
REDISMODULE_NOT_USED(argv);
REDISMODULE_NOT_USED(argc);
if (pipe(fds) < 0) return REDISMODULE_ERR;
if (RedisModule_EventLoopAdd(fds[0], 9999999, onReadable, NULL)
== REDISMODULE_OK || errno != EINVAL) {
RedisModule_ReplyWithError(ctx, "ERR non-existing event type should fail");
goto out;
}
if (RedisModule_EventLoopAdd(-1, REDISMODULE_EVENTLOOP_READABLE, onReadable, NULL)
== REDISMODULE_OK || errno != ERANGE) {
RedisModule_ReplyWithError(ctx, "ERR out of range fd should fail");
goto out;
}
if (RedisModule_EventLoopAdd(99999999, REDISMODULE_EVENTLOOP_READABLE, onReadable, NULL)
== REDISMODULE_OK || errno != ERANGE) {
RedisModule_ReplyWithError(ctx, "ERR out of range fd should fail");
goto out;
}
if (RedisModule_EventLoopAdd(fds[0], REDISMODULE_EVENTLOOP_READABLE, NULL, NULL)
== REDISMODULE_OK || errno != EINVAL) {
RedisModule_ReplyWithError(ctx, "ERR null callback should fail");
goto out;
}
if (RedisModule_EventLoopAdd(fds[0], 9999999, onReadable, NULL)
== REDISMODULE_OK || errno != EINVAL) {
RedisModule_ReplyWithError(ctx, "ERR non-existing event type should fail");
goto out;
}
if (RedisModule_EventLoopDel(fds[0], REDISMODULE_EVENTLOOP_READABLE)
!= REDISMODULE_OK || errno != 0) {
RedisModule_ReplyWithError(ctx, "ERR del on non-registered fd should not fail");
goto out;
}
if (RedisModule_EventLoopDel(fds[0], 9999999) == REDISMODULE_OK ||
errno != EINVAL) {
RedisModule_ReplyWithError(ctx, "ERR non-existing event type should fail");
goto out;
}
if (RedisModule_EventLoopDel(-1, REDISMODULE_EVENTLOOP_READABLE)
== REDISMODULE_OK || errno != ERANGE) {
RedisModule_ReplyWithError(ctx, "ERR out of range fd should fail");
goto out;
}
if (RedisModule_EventLoopDel(99999999, REDISMODULE_EVENTLOOP_READABLE)
== REDISMODULE_OK || errno != ERANGE) {
RedisModule_ReplyWithError(ctx, "ERR out of range fd should fail");
goto out;
}
if (RedisModule_EventLoopAdd(fds[0], REDISMODULE_EVENTLOOP_READABLE, onReadable, NULL)
!= REDISMODULE_OK || errno != 0) {
RedisModule_ReplyWithError(ctx, "ERR Add failed");
goto out;
}
if (RedisModule_EventLoopAdd(fds[0], REDISMODULE_EVENTLOOP_READABLE, onReadable, NULL)
!= REDISMODULE_OK || errno != 0) {
RedisModule_ReplyWithError(ctx, "ERR Adding same fd twice failed");
goto out;
}
if (RedisModule_EventLoopDel(fds[0], REDISMODULE_EVENTLOOP_READABLE)
!= REDISMODULE_OK || errno != 0) {
RedisModule_ReplyWithError(ctx, "ERR Del failed");
goto out;
}
if (RedisModule_EventLoopAddOneShot(NULL, NULL) == REDISMODULE_OK || errno != EINVAL) {
RedisModule_ReplyWithError(ctx, "ERR null callback should fail");
goto out;
}
RedisModule_ReplyWithSimpleString(ctx, "OK");
out:
close(fds[0]);
close(fds[1]);
return REDISMODULE_OK;
}
static long long beforeSleepCount;
static long long afterSleepCount;
int iteration(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
REDISMODULE_NOT_USED(argv);
REDISMODULE_NOT_USED(argc);
/* On each event loop iteration, eventloopCallback() is called. We increment
* beforeSleepCount and afterSleepCount, so these two should be equal.
* We reply with iteration count, caller can test if iteration count
* increments monotonically */
RedisModule_Assert(beforeSleepCount == afterSleepCount);
RedisModule_ReplyWithLongLong(ctx, beforeSleepCount);
return REDISMODULE_OK;
}
void oneshotCallback(void* arg)
{
RedisModule_Assert(strcmp(arg, "userdata") == 0);
RedisModule_ReplyWithSimpleString(reply_ctx, "OK");
RedisModule_FreeThreadSafeContext(reply_ctx);
RedisModule_UnblockClient(bc, NULL);
}
int oneshot(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
REDISMODULE_NOT_USED(argv);
REDISMODULE_NOT_USED(argc);
bc = RedisModule_BlockClient(ctx, NULL, NULL, NULL, 0);
reply_ctx = RedisModule_GetThreadSafeContext(bc);
if (RedisModule_EventLoopAddOneShot(oneshotCallback, "userdata") != REDISMODULE_OK) {
RedisModule_ReplyWithError(ctx, "ERR oneshot failed");
RedisModule_FreeThreadSafeContext(reply_ctx);
RedisModule_UnblockClient(bc, NULL);
}
return REDISMODULE_OK;
}
void eventloopCallback(struct RedisModuleCtx *ctx, RedisModuleEvent eid, uint64_t subevent, void *data) {
REDISMODULE_NOT_USED(ctx);
REDISMODULE_NOT_USED(eid);
REDISMODULE_NOT_USED(subevent);
REDISMODULE_NOT_USED(data);
RedisModule_Assert(eid.id == REDISMODULE_EVENT_EVENTLOOP);
if (subevent == REDISMODULE_SUBEVENT_EVENTLOOP_BEFORE_SLEEP)
beforeSleepCount++;
else if (subevent == REDISMODULE_SUBEVENT_EVENTLOOP_AFTER_SLEEP)
afterSleepCount++;
}
int RedisModule_OnLoad(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
REDISMODULE_NOT_USED(argv);
REDISMODULE_NOT_USED(argc);
if (RedisModule_Init(ctx,"eventloop",1,REDISMODULE_APIVER_1)
== REDISMODULE_ERR) return REDISMODULE_ERR;
/* Test basics. */
if (RedisModule_CreateCommand(ctx, "test.sanity", sanity, "", 0, 0, 0)
== REDISMODULE_ERR) return REDISMODULE_ERR;
/* Register a command to create a pipe() and send data through it by using
* event loop API. */
if (RedisModule_CreateCommand(ctx, "test.sendbytes", sendbytes, "", 0, 0, 0)
== REDISMODULE_ERR) return REDISMODULE_ERR;
/* Register a command to return event loop iteration count. */
if (RedisModule_CreateCommand(ctx, "test.iteration", iteration, "", 0, 0, 0)
== REDISMODULE_ERR) return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx, "test.oneshot", oneshot, "", 0, 0, 0)
== REDISMODULE_ERR) return REDISMODULE_ERR;
if (RedisModule_SubscribeToServerEvent(ctx, RedisModuleEvent_EventLoop,
eventloopCallback) != REDISMODULE_OK) return REDISMODULE_ERR;
return REDISMODULE_OK;
}
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