9fa588566f
This commit does a number of things to start the transition of channels from kernel to user space: - Remove channel objects / syscalls from the kernel - Add mutex type in libj6 - Add condition type in libj6 - Add a `ring` type flag for VMA syscalls to create ring buffers - Implement a rudimentary shared memory channel using all of the above
88 lines
1.6 KiB
C++
88 lines
1.6 KiB
C++
#include <j6/errors.h>
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#include <j6/flags.h>
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#include <util/util.h>
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#include "objects/mailbox.h"
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#include "objects/thread.h"
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#include "syscalls/helpers.h"
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using namespace obj;
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namespace syscalls {
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j6_status_t
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mailbox_create(j6_handle_t *self)
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{
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construct_handle<mailbox>(self);
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return j6_status_ok;
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}
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j6_status_t
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mailbox_close(mailbox *self)
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{
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if (self->closed())
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return j6_status_closed;
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self->close();
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return j6_status_ok;
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}
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j6_status_t
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mailbox_call(
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mailbox *self,
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uint64_t *tag,
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uint64_t *subtag,
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j6_handle_t *handle)
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{
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thread::message_data &data =
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thread::current().get_message_data();
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data.tag = *tag;
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data.subtag = *subtag;
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data.handle = *handle;
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j6_status_t s = self->call();
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if (s != j6_status_ok)
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return s;
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*tag = data.tag;
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*subtag = data.subtag;
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*handle = data.handle;
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process::current().add_handle(*handle);
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return j6_status_ok;
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}
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j6_status_t
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mailbox_respond(
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mailbox *self,
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uint64_t *tag,
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uint64_t *subtag,
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j6_handle_t *handle,
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uint64_t *reply_tag,
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uint64_t flags)
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{
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thread::message_data data { *tag, *subtag, *handle };
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if (*reply_tag) {
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j6_status_t s = self->reply(*reply_tag, data);
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if (s != j6_status_ok)
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return s;
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}
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bool block = flags & j6_flag_block;
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j6_status_t s = self->receive(data, *reply_tag, block);
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if (s != j6_status_ok)
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return s;
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*tag = data.tag;
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*subtag = data.subtag;
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*handle = data.handle;
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process::current().add_handle(*handle);
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return j6_status_ok;
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}
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} // namespace syscalls
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