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//
// Copyright 2017 Garrett D'Amore <garrett@damore.org>
//
// This software is supplied under the terms of the MIT License, a
// copy of which should be located in the distribution where this
// file was obtained (LICENSE.txt). A copy of the license may also be
// found online at https://opensource.org/licenses/MIT.
//
// POSIX threads.
#include "core/nng_impl.h"
#ifdef PLATFORM_WINDOWS
void *
nni_alloc(size_t sz)
{
void *v;
v = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sz);
return (v);
}
void
nni_free(void *b, size_t z)
{
NNI_ARG_UNUSED(z);
HeapFree(GetProcessHeap(), 0, b);
}
int
nni_plat_mtx_init(nni_plat_mtx *mtx)
{
InitializeSRWLock(&mtx->srl);
mtx->init = 1;
return (0);
}
void
nni_plat_mtx_fini(nni_plat_mtx *mtx)
{
mtx->init = 0;
}
void
nni_plat_mtx_lock(nni_plat_mtx *mtx)
{
AcquireSRWLockExclusive(&mtx->srl);
}
void
nni_plat_mtx_unlock(nni_plat_mtx *mtx)
{
ReleaseSRWLockExclusive(&mtx->srl);
}
int
nni_plat_cv_init(nni_plat_cv *cv, nni_plat_mtx *mtx)
{
InitializeConditionVariable(&cv->cv);
cv->srl = &mtx->srl;
return (0);
}
void
nni_plat_cv_wake(nni_plat_cv *cv)
{
WakeAllConditionVariable(&cv->cv);
}
void
nni_plat_cv_wait(nni_plat_cv *cv)
{
(void) SleepConditionVariableSRW(&cv->cv, cv->srl, INFINITE, 0);
}
int
nni_plat_cv_until(nni_plat_cv *cv, nni_time until)
{
nni_time now;
DWORD msec;
BOOL ok;
now = nni_plat_clock();
if (now > until) {
msec = 0;
} else {
// times are in usec, but win32 wants millis
msec = (DWORD) (((until - now) + 999)/1000);
}
ok = SleepConditionVariableSRW(&cv->cv, cv->srl, msec, 0);
return (ok ? 0 : NNG_ETIMEDOUT);
}
void
nni_plat_cv_fini(nni_plat_cv *cv)
{
}
static unsigned int __stdcall
nni_plat_thr_main(void *arg)
{
nni_plat_thr *thr = arg;
thr->func(thr->arg);
return (0);
}
int
nni_plat_thr_init(nni_plat_thr *thr, void (*fn)(void *), void *arg)
{
thr->func = fn;
thr->arg = arg;
// We could probably even go down to 8k... but crypto for some
// protocols might get bigger than this. 1MB is waaay too big.
thr->handle = (HANDLE) _beginthreadex(NULL, 16384,
nni_plat_thr_main, thr, STACK_SIZE_PARAM_IS_A_RESERVATION,
NULL);
if (thr->handle == NULL) {
return (NNG_ENOMEM); // Best guess...
}
return (0);
}
void
nni_plat_thr_fini(nni_plat_thr *thr)
{
if (WaitForSingleObject(thr->handle, INFINITE) == WAIT_FAILED) {
nni_panic("waiting for thread failed!");
}
if (CloseHandle(thr->handle) == 0) {
nni_panic("close handle for thread failed!");
}
}
int
nni_plat_init(int (*helper)(void))
{
static LONG inited = 0;
int rv;
static SRWLOCK lock = SRWLOCK_INIT;
if (inited) {
return (0); // fast path
}
AcquireSRWLockExclusive(&lock);
if (!inited) {
WSADATA data;
WORD ver;
ver = MAKEWORD(2, 2);
if (WSAStartup(MAKEWORD(2, 2), &data) != 0) {
if ((LOBYTE(data.wVersion) != 2) ||
(HIBYTE(data.wVersion) != 2)) {
nni_panic("got back wrong winsock ver");
}
rv = NNG_EINVAL;
goto out;
}
if ((rv = nni_win_iocp_sysinit()) != 0) {
goto out;
}
if ((rv = nni_win_resolv_sysinit()) != 0) {
goto out;
}
if ((rv = nni_win_ipc_sysinit()) != 0) {
goto out;
}
helper();
inited = 1;
}
out:
ReleaseSRWLockExclusive(&lock);
return (rv);
}
void
nni_plat_fini(void)
{
nni_win_ipc_sysfini();
nni_win_resolv_sysfini();
nni_win_iocp_sysfini();
WSACleanup();
}
#else
// Suppress empty symbols warnings in ranlib.
int nni_win_thread_not_used = 0;
#endif
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