> http://en.wikipedia.org/wiki/Ring_buffer#Exemplary_POSIX_Implementation > > This doesn't appear to work on sparclinux, returning an error EINVAL on > the second memory map operation: > > address = mmap (buffer->address + buffer->count_bytes, > buffer->count_bytes, PROT_READ | PROT_WRITE, > MAP_FIXED | MAP_SHARED, file_descriptor, 0); > > Any ideas? Steven the problem are on the second mmap, this is the third call to mmap... First call: buffer->address = mmap (NULL, buffer->count_bytes << 1, PROT_NONE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); Second call (where the problem occurs, returns 0xffffffff): address = mmap (buffer->address, buffer->count_bytes, PROT_READ | PROT_WRITE, MAP_FIXED | MAP_SHARED, file_descriptor, 0); Third (is not called because the error of the second) : address = mmap (buffer->address + buffer->count_bytes, buffer->count_bytes, PROT_READ | PROT_WRITE, MAP_FIXED | MAP_SHARED, file_descriptor, 0); Some ideas ? What can be the reason of this behavior ? -- William Felipe Welter ------------------------------ Consultor em Tecnologias Livres william.welter@xxxxxxxxxxxxx www.4linux.com.br -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
