bees: remove local cruft, throw at github

lib/process.cc

@@ -0,0 +1,121 @@
+#include "crucible/process.h"
+
+#include "crucible/chatter.h"
+#include "crucible/error.h"
+
+#include <utility>
+
+// for gettid()
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+#include <unistd.h>
+#include <sys/syscall.h>
+
+namespace crucible {
+	using namespace std;
+
+	bool
+	Process::joinable()
+	{
+		return !!m_pid;
+	}
+
+	Process::~Process()
+	{
+		if (joinable()) {
+			// because it's just not the same without the word "zombie"...
+			CHATTER("ZOMBIE WARNING: joinable Process pid " << m_pid << " abandoned");
+		}
+	}
+
+	Process::Process() :
+		m_pid(0)
+	{
+	}
+
+	Process::Process(Process &&move_from) :
+		m_pid(0)
+	{
+		swap(m_pid, move_from.m_pid);
+	}
+
+	void
+	Process::do_fork(function<int()> child_func)
+	{
+		int rv = fork();
+		if (rv < 0) {
+			THROW_ERRNO("fork failed");
+		}
+		m_pid = rv;
+
+		if (rv == 0) {
+			// child
+			catch_all([&]() {
+				int rv = child_func();
+				exit(rv);
+			});
+			terminate();
+		}
+	}
+
+	Process::status_type
+	Process::join()
+	{
+		if (m_pid == 0) {
+			THROW_ERROR(invalid_argument, "Process not created");
+		}
+
+		int status = 0;
+		pid_t rv = waitpid(m_pid, &status, 0);
+		if (rv == -1) {
+			THROW_ERRNO("waitpid failed, pid = " << m_pid);
+		}
+		if (rv != m_pid) {
+			THROW_ERROR(runtime_error, "waitpid failed, wanted pid = " << m_pid << ", got rv = " << rv << ", status = " << status);
+		}
+		m_pid = 0;
+		return status;
+	}
+
+	void
+	Process::detach()
+	{
+		m_pid = 0;
+	}
+
+	Process::native_handle_type
+	Process::native_handle()
+	{
+		return m_pid;
+	}
+
+	Process::id
+	Process::get_id()
+	{
+		return m_pid;
+	}
+
+	void
+	Process::kill(int sig)
+	{
+		if (!m_pid) {
+			THROW_ERROR(invalid_argument, "Process not created");
+		}
+
+		int rv = ::kill(m_pid, sig);
+		if (rv) {
+			THROW_ERRNO("killing process " << m_pid << " with signal " << sig);
+		}
+	}
+
+	template<>
+	struct ResourceHandle<Process::id, Process>;
+
+	pid_t
+	gettid()
+	{
+		return syscall(SYS_gettid);
+	}
+
+}