[Mammoth] Move ipc calls to separate folder mammoth.

lib/mammoth/ipc/channel.cpp

@@ -0,0 +1,57 @@
+#include "ipc/channel.h"
+
+#include <zcall.h>
+
+#include "mammoth/debug.h"
+
+namespace {
+
+uint64_t strlen(const char* ptr) {
+  uint64_t len = 0;
+  while (*ptr != '\0') {
+    len++;
+    ptr++;
+  }
+  return len;
+}
+
+}  // namespace
+
+void Channel::adopt_cap(uint64_t id) {
+  if (chan_cap_ != 0) {
+    crash("Adopting over channel.", glcr::ALREADY_EXISTS);
+  }
+  chan_cap_ = id;
+}
+z_cap_t Channel::release_cap() {
+  z_cap_t cap = chan_cap_;
+  chan_cap_ = 0;
+  return cap;
+}
+
+z_cap_t Channel::cap() { return chan_cap_; }
+
+z_err_t Channel::WriteStr(const char* msg) {
+  if (!chan_cap_) {
+    return glcr::NULL_PTR;
+  }
+  return ZChannelSend(chan_cap_, strlen(msg), msg, 0, nullptr);
+}
+
+z_err_t Channel::ReadStr(char* buffer, uint64_t* size) {
+  if (!chan_cap_) {
+    return glcr::NULL_PTR;
+  }
+  uint64_t num_caps = 0;
+  return ZChannelRecv(chan_cap_, size, reinterpret_cast<uint8_t*>(buffer),
+                      &num_caps, nullptr);
+}
+
+z_err_t CreateChannels(Channel& c1, Channel& c2) {
+  z_cap_t chan1, chan2;
+  RET_ERR(ZChannelCreate(&chan1, &chan2));
+
+  c1.adopt_cap(chan1);
+  c2.adopt_cap(chan2);
+  return glcr::OK;
+}