setup.c

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// SPDX-License-Identifier: GPL-2.0
#include <pthread.h>
#include <dlfcn.h>

#include "../util/cache.h"
#include "../util/debug.h"
#include "../util/hist.h"
#include "../util/util.h"

pthread_mutex_t ui__lock = PTHREAD_MUTEX_INITIALIZER;
void *perf_gtk_handle;
int use_browser = -1;

#define PERF_GTK_DSO "libperf-gtk.so"

#ifdef HAVE_GTK2_SUPPORT

static int setup_gtk_browser(void)
{
    int (*perf_ui_init)(void);

    if (perf_gtk_handle)
        return 0;

    perf_gtk_handle = dlopen(PERF_GTK_DSO, RTLD_LAZY);
    if (perf_gtk_handle == NULL) {
        char buf[PATH_MAX];
        scnprintf(buf, sizeof(buf), "%s/%s", LIBDIR, PERF_GTK_DSO);
        perf_gtk_handle = dlopen(buf, RTLD_LAZY);
    }
    if (perf_gtk_handle == NULL)
        return -1;

    perf_ui_init = dlsym(perf_gtk_handle, "perf_gtk__init");
    if (perf_ui_init == NULL)
        goto out_close;

    if (perf_ui_init() == 0)
        return 0;

out_close:
    dlclose(perf_gtk_handle);
    return -1;
}

static void exit_gtk_browser(bool wait_for_ok)
{
    void (*perf_ui_exit)(bool);

    if (perf_gtk_handle == NULL)
        return;

    perf_ui_exit = dlsym(perf_gtk_handle, "perf_gtk__exit");
    if (perf_ui_exit == NULL)
        goto out_close;

    perf_ui_exit(wait_for_ok);

out_close:
    dlclose(perf_gtk_handle);

    perf_gtk_handle = NULL;
}
#else
static inline int setup_gtk_browser(void) { return -1; }
static inline void exit_gtk_browser(bool wait_for_ok __maybe_unused) {}
#endif

int stdio__config_color(const struct option *opt __maybe_unused,
            const char *mode, int unset __maybe_unused)
{
    perf_use_color_default = perf_config_colorbool("color.ui", mode, -1);
    return 0;
}

void setup_browser(bool fallback_to_pager)
{
    if (use_browser < 2 && (!isatty(1) || dump_trace))
        use_browser = 0;

    /* default to TUI */
    if (use_browser < 0)
        use_browser = 1;

    switch (use_browser) {
    case 2:
        if (setup_gtk_browser() == 0)
            break;
        printf("GTK browser requested but could not find %s\n",
               PERF_GTK_DSO);
        sleep(1);
        /* fall through */
    case 1:
        use_browser = 1;
        if (ui__init() == 0)
            break;
        /* fall through */
    default:
        use_browser = 0;
        if (fallback_to_pager)
            setup_pager();
        break;
    }
}

void exit_browser(bool wait_for_ok)
{
    switch (use_browser) {
    case 2:
        exit_gtk_browser(wait_for_ok);
        break;

    case 1:
        ui__exit(wait_for_ok);
        break;

    default:
        break;
    }
}