source: trunk/src/3rdparty/os2/xsystray/xsystray_api.c@ 270

/*
 * Extended system tray widget for XCenter/eCenter
 *
 * Public API implementation
 *
 * Made by netlabs.org
 *
 * Author: Dmitry A. Kuminov
 *
 * This software is public domain.
 *
 * WITHOUT ANY WARRANTY..., AT YOUR OWN RISC... ETC.
 *
 */

#define INCL_DOSERRORS
#define INCL_DOSPROCESS
#define INCL_WINWINDOWMGR
#define INCL_WINATOM
#define INCL_WINPOINTERS
#include <os2.h>

#include "xsystray_api.h"
#include "xsystray.h"

#include <string.h>
#include <sys/builtin.h>        // atomics
#include <InnotekLIBC/thread.h> // TLS

static HWND G_hwndSysTray = NULLHANDLE;
static int G_itlsSysTrayCtlData = -1;

static HWND FindSysTrayWindow()
{
    char buf[sizeof(WNDCLASS_WIDGET_XSYSTRAY_SERVER) + 1];
    HWND hwnd;
    HENUM henum = WinBeginEnumWindows(HWND_DESKTOP);
    while ((hwnd = WinGetNextWindow(henum)) != NULLHANDLE)
    {
        LONG len = WinQueryClassName(hwnd, sizeof(buf), buf);
        buf[len] = '\0';
        if (strcmp(WNDCLASS_WIDGET_XSYSTRAY_SERVER, buf) == 0)
            break;
    }
    WinEndEnumWindows(henum);

    return hwnd;
}

static BOOL SendSysTrayCtlMsg(PSYSTRAYCTLDATA pData)
{
    APIRET arc;
    PID pid;
    TID tid;
    MRESULT mrc;

    BOOL bTriedFind = FALSE;

    do
    {
        if (G_hwndSysTray == NULLHANDLE)
        {
            bTriedFind = TRUE;
            HWND hwnd = FindSysTrayWindow();
            __atomic_cmpxchg32((uint32_t *)&G_hwndSysTray, hwnd, NULLHANDLE);
            if (G_hwndSysTray == NULLHANDLE)
                break;
        }

        if (bTriedFind)
        {
            arc = ERROR_INVALID_HANDLE;
            if (WinQueryWindowProcess(G_hwndSysTray, &pid, &tid))
                arc = DosGiveSharedMem(__libc_TLSGet(G_itlsSysTrayCtlData),
                                       pid, PAG_READ | PAG_WRITE);
            if (arc != NO_ERROR)