How do i share an sqlite memory database with another connection - sqlite

Question

I'm trying to use a sqlite memory db ala "file:zmem?mode=memory&cache=shared" with multiple threads. To test this i have the following code which is not multi threaded, but just opens a second connection to the same memory db to read the results. Unfortunately i'm not able to find any working code samples on either sqlite.org or any other site on the internet.
I have the following C99 test code which works until another connection tries to access what the first connection created.
#include <sqlite3.h>
#include <stdio.h>
int exec(sqlite3 *db, char* sql) {
sqlite3_stmt *stmt;
int ret;
do {
ret = sqlite3_prepare_v2(db, sql, -1, &stmt, 0);
if (ret != SQLITE_OK) {
printf("prep error: %s", sqlite3_errmsg(db));
break;
}
ret = sqlite3_step(stmt);
if (ret != SQLITE_DONE) {
printf("step error: %s", sqlite3_errmsg(db));
break;
}
ret = SQLITE_OK;
} while(0);
sqlite3_finalize(stmt);
return ret;
}
sqlite3* getCon(char *name) {
sqlite3 *db = 0;
int flags = SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE |
SQLITE_OPEN_NOMUTEX | SQLITE_OPEN_MEMORY | SQLITE_OPEN_SHAREDCACHE;
int ret = sqlite3_open_v2(name, &db, flags, 0);
if (ret != SQLITE_OK) {
printf("no open");
}
return db;
}
void query(sqlite3 *db) {
sqlite3_stmt *stmt = 0;
do {
int ret = sqlite3_prepare_v2(db, "SELECT * FROM MyTable", -1, &stmt, 0);
if (ret != SQLITE_OK) {
printf("prep error: %s\n", sqlite3_errmsg(db));
break;
}
while ((ret = sqlite3_step(stmt)) == SQLITE_ROW) {
char *name = (char *) sqlite3_column_text(stmt, 0);
printf("%s\n", name);
}
if (ret != SQLITE_DONE) {
printf("step error: %s\n", sqlite3_errmsg(db));
}
} while(0);
sqlite3_finalize(stmt);
}
int main() {
sqlite3 *db = 0, *db2 = 0;
char *label = "zmem";
char bf[64];
char *buf = &bf[0];
int ret, i;
do {
db = getCon(label);
if (!db) break;
printf("connected\n");
ret = exec(db, "CREATE TABLE MyTable (test VARCHAR(255));");
if (ret != SQLITE_OK) break;
for (i = 1; i <= 3; i++) {
sprintf(buf,"insert into MyTable (test) values('Hello Row %d')", i);
ret = exec(db, buf);
if (ret != SQLITE_OK) break;
}
query(db);
db2 = getCon(label);
if (!db2) break;
printf("connected 2\n");
query(db2);
} while(0);
if (db) sqlite3_close(db);
if (db2) sqlite3_close(db2);
}
When i run this code it produces the following for me
connected
Hello Row 1
Hello Row 2
Hello Row 3
connected 2
prep error: no such table: MyTable
Could someone clue me in on how to properly do this?