Comments (3)
I just glanced over the code quickly, so I'm not entirely sure: but it looks like all the data is transferred in-line. There is no need to split up anything: just make sure large data blocks are transferred out-of-line instead. This avoids any size restrictions, saves memory (I think), and it's even faster on some architectures. (Not on x86 though AIUI, unless using large pages I guess...)
from ipc-channel.
Also, this problem can be worked around by not sending possibly very large things in the message directly, but rather setting up a shared memory region instead -- that's effectively the same as doing an out-of-line transfer on Mach.
The downside is that it's much more complicated to use. OTOH, it avoids the need to do serialisation when not strictly necessary, so it might potentially increase performance significantly.
It might be worth considering to use shared memory transparently for large messages in the platform-independent part of ipc-channel
. This would allow simpler platform backends, as they would need no special handling for large messages this way...
from ipc-channel.
Summing up, I see three distinct ways to address this problem:
- Use out-of-line transfers in the
macos
backend. - Transparently use shared memory for large transfers, in a platform-independent fashion.
- Punt to the caller -- the caller explicitly needs to use shared memory for transfers that might get very large.
Variant 2. is the most involved in terms of code changes, but might be the best approach in the long run -- not sure. 1. or 3. are easier short-term solutions, each with different trade-offs.
from ipc-channel.
Related Issues (20)
- IpcReceiver hangs indefinitely on MacOS when other process ends HOT 6
- Add API so allow for a select-like mechanism using the ROUTER
- macos::OsIpcSharedMemory::from_bytes aborts if passed an empty slice
- Implement `std::error::Error` on error types
- IpcBytesSender::send will hang up when receiver is not work. HOT 1
- Panic on large data transfer HOT 1
- IpcReceiver hang, forking leaks file descriptors, problem/discussion HOT 1
- Release a new version HOT 2
- panic when some conditions
- Could you please publish a new version to crates.io?
- cargo-careful panics due to `stat` being left uninitialized
- Channel between 64-bit and 32-bit process
- Trivial Example Not Working HOT 6
- Why can I only connect to IpcSender and not IpcReceiver? HOT 8
- IpcOneShotServer::accept is blocking and has no non-blocking version HOT 2
- Vulnerability in crossbeam-utils dependency HOT 1
- Apple recommends against direct use of Mach
- Sending an IpcReceiver over a previously sent IpcChannel doesn't work on Windows
- macOS builds are broken with recent rustc HOT 2
- Doc page not being updated HOT 1
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