610 lines
17 KiB
C++
610 lines
17 KiB
C++
/*
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* chr - Andrew Chronister &
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* inso - Alex Baines
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*
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* 02.02.2020
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*
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* Updated linux layer for 4coder
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*
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*/
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internal String_Const_u8
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system_get_path(Arena* arena, System_Path_Code path_code){
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String_Const_u8 result = {};
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switch (path_code){
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case SystemPath_CurrentDirectory: {
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// glibc extension: getcwd allocates its own memory if passed NULL
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char *working_dir = getcwd(NULL, 0);
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LINUX_FN_DEBUG("cwd = [%s]", working_dir);
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u64 working_dir_len = cstring_length(working_dir);
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u8 *out = push_array(arena, u8, working_dir_len + 1);
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block_copy(out, working_dir, working_dir_len);
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// NOTE: 4ed appears to expect a slash on the end.
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out[working_dir_len] = '/';
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free(working_dir);
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result = SCu8(out, working_dir_len + 1);
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} break;
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case SystemPath_Binary: {
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// linux-specific: binary path symlinked at /proc/self/exe
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// PATH_MAX is probably good enough...
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// read the 'readlink' manpage for some comedy about it being 'broken by design'.
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char* buf = push_array(arena, char, PATH_MAX);
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ssize_t n = readlink("/proc/self/exe", buf, PATH_MAX);
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if(n == -1) {
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perror("readlink");
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*buf = n = 0;
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}
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result = string_remove_last_folder(SCu8(buf, n));
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LINUX_FN_DEBUG("bin dir = [%.*s]", (int)result.size, result.str);
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} break;
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}
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return(result);
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}
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internal String_Const_u8
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system_get_canonical(Arena* arena, String_Const_u8 name){
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LINUX_FN_DEBUG("%.*s", (int)name.size, name.str);
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// TODO(andrew): Resolve symlinks ?
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// TODO(andrew): Resolve . and .. in paths
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// TODO(andrew): Use realpath(3)
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return name;
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}
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internal File_List
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system_get_file_list(Arena* arena, String_Const_u8 directory){
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LINUX_FN_DEBUG("%.*s", (int)directory.size, directory.str);
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File_List result = {};
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String_Const_u8 search_pattern = {};
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if (character_is_slash(string_get_character(directory, directory.size - 1))){
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search_pattern = push_u8_stringf(arena, "%.*s*", string_expand(directory));
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}
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else{
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search_pattern = push_u8_stringf(arena, "%.*s/*", string_expand(directory));
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}
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struct dirent** dir_ents = NULL;
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int num_ents = scandir(
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(const char*)search_pattern.str, &dir_ents, linux_system_get_file_list_filter, alphasort);
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File_Info *first = 0;
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File_Info *last = 0;
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for (int i = 0; i < num_ents; ++i) {
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struct dirent* dirent = dir_ents[i];
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File_Info *info = push_array(arena, File_Info, 1);
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sll_queue_push(first, last, info);
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info->file_name = SCu8((u8*)dirent->d_name);
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struct stat file_stat;
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stat((const char*)dirent->d_name, &file_stat);
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info->attributes = linux_file_attributes_from_struct_stat(file_stat);
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}
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result.infos = push_array(arena, File_Info*, num_ents);
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result.count = num_ents;
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i32 info_index = 0;
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for (File_Info* node = first; node != NULL; node = node->next) {
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result.infos[info_index] = node;
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info_index += 1;
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}
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return result;
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}
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internal File_Attributes
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system_quick_file_attributes(Arena* scratch, String_Const_u8 file_name){
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LINUX_FN_DEBUG("%.*s", (int)file_name.size, file_name.str);
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struct stat file_stat;
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stat((const char*)file_name.str, &file_stat);
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return linux_file_attributes_from_struct_stat(file_stat);
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}
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internal b32
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system_load_handle(Arena* scratch, char* file_name, Plat_Handle* out){
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LINUX_FN_DEBUG("%s", file_name);
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int fd = open(file_name, O_RDONLY);
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if (fd != -1) {
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*(int*)out = fd;
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return true;
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}
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return false;
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}
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internal File_Attributes
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system_load_attributes(Plat_Handle handle){
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LINUX_FN_DEBUG();
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struct stat file_stat;
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fstat(*(int*)&handle, &file_stat);
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return linux_file_attributes_from_struct_stat(file_stat);
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}
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internal b32
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system_load_file(Plat_Handle handle, char* buffer, u32 size){
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LINUX_FN_DEBUG("%.*s", size, buffer);
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int fd = *(int*)&handle;
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int bytes_read = read(fd, buffer, size);
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if (bytes_read == size) {
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return true;
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}
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return false;
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}
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internal b32
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system_load_close(Plat_Handle handle){
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LINUX_FN_DEBUG();
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int fd = *(int*)&handle;
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return close(fd) == 0;
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}
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internal File_Attributes
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system_save_file(Arena* scratch, char* file_name, String_Const_u8 data){
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LINUX_FN_DEBUG("%s", file_name);
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File_Attributes result = {};
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int fd = open(file_name, O_WRONLY, O_CREAT);
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if (fd != -1) {
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int bytes_written = write(fd, data.str, data.size);
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if (bytes_written != -1) {
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struct stat file_stat;
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fstat(fd, &file_stat);
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return linux_file_attributes_from_struct_stat(file_stat);
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}
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}
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return result;
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}
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internal b32
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system_load_library(Arena* scratch, String_Const_u8 file_name, System_Library* out){
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LINUX_FN_DEBUG("%.*s", (int)file_name.size, file_name.str);
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void* library = dlopen((const char*)file_name.str, RTLD_LAZY);
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if (library != NULL) {
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*(void**)out = library;
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return true;
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}
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return false;
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}
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internal b32
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system_release_library(System_Library handle){
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LINUX_FN_DEBUG();
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return dlclose(*(void**)&handle) == 0;
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}
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internal Void_Func*
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system_get_proc(System_Library handle, char* proc_name){
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LINUX_FN_DEBUG("%s", proc_name);
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return (Void_Func*)dlsym(*(void**)&handle, proc_name);
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}
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internal u64
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system_now_time(void){
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LINUX_FN_DEBUG();
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struct timespec time;
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clock_gettime(CLOCK_MONOTONIC_RAW, &time);
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return linux_u64_from_timespec(time);
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}
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internal Plat_Handle
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system_wake_up_timer_create(void){
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LINUX_FN_DEBUG();
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Linux_Object* object = linux_alloc_object(LinuxObjectKind_Timer);
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dll_insert(&linuxvars.timer_objects, &object->node);
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// NOTE(inso): timers created on-demand to avoid file-descriptor exhaustion.
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object->timer.fd = -1;
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}
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internal void
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system_wake_up_timer_release(Plat_Handle handle){
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LINUX_FN_DEBUG();
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Linux_Object* object = handle_to_object(handle);
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if (object->kind == LinuxObjectKind_Timer){
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if(object->timer.fd != -1) {
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epoll_ctl(linuxvars.epoll, EPOLL_CTL_DEL, object->timer.fd, NULL);
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close(object->timer.fd);
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object->timer.fd = -1;
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}
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linux_free_object(object);
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}
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}
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internal void
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system_wake_up_timer_set(Plat_Handle handle, u32 time_milliseconds){
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LINUX_FN_DEBUG("%d", time_milliseconds);
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Linux_Object* object = handle_to_object(handle);
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if (object->kind == LinuxObjectKind_Timer){
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if(object->timer.fd == -1) {
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object->timer.fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK | TFD_CLOEXEC);
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}
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struct itimerspec it = {};
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it.it_value.tv_sec = time_milliseconds / 1000;
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it.it_value.tv_nsec = (time_milliseconds % 1000) * UINT64_C(1000000);
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struct epoll_event ev;
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ev.events = EPOLLIN | EPOLLET | EPOLLONESHOT;
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ev.data.ptr = &object->timer.epoll_tag;
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epoll_ctl(linuxvars.epoll, EPOLL_CTL_ADD, object->timer.fd, &ev);
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}
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}
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internal void
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system_signal_step(u32 code){
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LINUX_FN_DEBUG("%d", code);
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linux_schedule_step();
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}
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internal void
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system_sleep(u64 microseconds){
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LINUX_FN_DEBUG("%" PRIu64, microseconds);
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struct timespec requested;
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struct timespec remaining;
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u64 seconds = microseconds / Million(1);
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requested.tv_sec = seconds;
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requested.tv_nsec = (microseconds - seconds * Million(1)) * Thousand(1);
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nanosleep(&requested, &remaining);
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}
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internal void
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system_post_clipboard(String_Const_u8 str){
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LINUX_FN_DEBUG("%.*s", (int)str.size, str.str);
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linalloc_clear(&linuxvars.clipboard_out_arena);
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char* p = push_array(&linuxvars.clipboard_out_arena, char, str.size + 1);
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block_copy(p, str.data, str.size);
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p[str.size] = '\0';
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XSetSelectionOwner(linuxvars.dpy, linuxvars.atom_CLIPBOARD, linuxvars.win, CurrentTime);
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}
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internal b32
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system_cli_call(Arena* scratch, char* path, char* script, CLI_Handles* cli_out){
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LINUX_FN_DEBUG("%s / %s", path, script);
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int pipe_fds[2];
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if (pipe(pipe_fds) == -1){
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perror("system_cli_call: pipe");
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return 0;
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}
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pid_t child_pid = vfork();
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if (child_pid == -1){
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perror("system_cli_call: fork");
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return 0;
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}
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enum { PIPE_FD_READ, PIPE_FD_WRITE };
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// child
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if (child_pid == 0){
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close(pipe_fds[PIPE_FD_READ]);
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dup2(pipe_fds[PIPE_FD_WRITE], STDOUT_FILENO);
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dup2(pipe_fds[PIPE_FD_WRITE], STDERR_FILENO);
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if (chdir(path) == -1){
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perror("system_cli_call: chdir");
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exit(1);
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}
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char* argv[] = { "sh", "-c", script, NULL };
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if (execv("/bin/sh", argv) == -1){
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perror("system_cli_call: execv");
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}
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exit(1);
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}
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else{
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close(pipe_fds[PIPE_FD_WRITE]);
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*(pid_t*)&cli_out->proc = child_pid;
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*(int*)&cli_out->out_read = pipe_fds[PIPE_FD_READ];
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*(int*)&cli_out->out_write = pipe_fds[PIPE_FD_WRITE];
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struct epoll_event e = {};
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e.events = EPOLLIN | EPOLLET;
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e.data.ptr = &epoll_tag_cli_pipe;
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epoll_ctl(linuxvars.epoll, EPOLL_CTL_ADD, pipe_fds[PIPE_FD_READ], &e);
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}
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return(true);
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}
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internal void
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system_cli_begin_update(CLI_Handles* cli){
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// NOTE(inso): I don't think anything needs to be done here.
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LINUX_FN_DEBUG();
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}
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internal b32
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system_cli_update_step(CLI_Handles* cli, char* dest, u32 max, u32* amount){
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LINUX_FN_DEBUG();
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int pipe_read_fd = *(int*)&cli->out_read;
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fd_set fds;
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FD_ZERO(&fds);
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FD_SET(pipe_read_fd, &fds);
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struct timeval tv = {};
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size_t space_left = max;
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char* ptr = dest;
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while (space_left > 0 && select(pipe_read_fd + 1, &fds, NULL, NULL, &tv) == 1){
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ssize_t num = read(pipe_read_fd, ptr, space_left);
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if (num == -1){
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perror("system_cli_update_step: read");
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} else if (num == 0){
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// NOTE(inso): EOF
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break;
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} else {
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ptr += num;
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space_left -= num;
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}
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}
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*amount = (ptr - dest);
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return((ptr - dest) > 0);
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}
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internal b32
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system_cli_end_update(CLI_Handles* cli){
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LINUX_FN_DEBUG();
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pid_t pid = *(pid_t*)&cli->proc;
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b32 close_me = false;
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int status;
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if (pid && waitpid(pid, &status, WNOHANG) > 0){
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cli->exit = WEXITSTATUS(status);
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close_me = true;
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close(*(int*)&cli->out_read);
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close(*(int*)&cli->out_write);
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struct epoll_event e = {};
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epoll_ctl(linuxvars.epoll, EPOLL_CTL_DEL, *(int*)&cli->out_read, &e);
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}
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return(close_me);
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}
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internal void
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system_open_color_picker(Color_Picker* picker){
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// TODO?
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LINUX_FN_DEBUG();
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}
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internal f32
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system_get_screen_scale_factor(void){
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LINUX_FN_DEBUG();
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// TODO: correct screen number somehow
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int dpi = linux_get_xsettings_dpi(linuxvars.dpy, 0);
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if(dpi == -1){
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int scr = DefaultScreen(linuxvars.dpy);
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int dw = DisplayWidth(linuxvars.dpy, scr);
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int dh = DisplayHeight(linuxvars.dpy, scr);
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int dw_mm = DisplayWidthMM(linuxvars.dpy, scr);
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int dh_mm = DisplayHeightMM(linuxvars.dpy, scr);
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int dpi_x = dw_mm ? dw / (dw_mm / 25.4) : 96;
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int dpi_y = dh_mm ? dh / (dh_mm / 25.4) : 96;
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dpi = dpi_x > dpi_y ? dpi_x : dpi_y;
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}
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return dpi / 96.0f;
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}
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internal System_Thread
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system_thread_launch(Thread_Function* proc, void* ptr){
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LINUX_FN_DEBUG();
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System_Thread result = {};
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Linux_Object* thread_info = linux_alloc_object(LinuxObjectKind_Thread);
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thread_info->thread.proc = proc;
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thread_info->thread.ptr = ptr;
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pthread_attr_t thread_attr;
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pthread_attr_init(&thread_attr);
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int create_result = pthread_create(
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&thread_info->thread.pthread,
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&thread_attr,
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linux_thread_proc_start,
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thread_info);
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pthread_attr_destroy(&thread_attr);
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// TODO(andrew): Need to wait for thread to confirm it launched?
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if (create_result == 0) {
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static_assert(sizeof(Linux_Object*) <= sizeof(System_Thread));
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*(Linux_Object**)&result = thread_info;
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return result;
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}
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return result;
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}
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internal void
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system_thread_join(System_Thread thread){
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LINUX_FN_DEBUG();
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Linux_Object* object = *(Linux_Object**)&thread;
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void* retval_ignored;
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int result = pthread_join(object->thread.pthread, &retval_ignored);
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}
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internal void
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system_thread_free(System_Thread thread){
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LINUX_FN_DEBUG();
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Linux_Object* object = *(Linux_Object**)&thread;
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Assert(object->kind == LinuxObjectKind_Thread);
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linux_free_object(object);
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}
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internal i32
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system_thread_get_id(void){
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pid_t id = syscall(__NR_gettid);
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LINUX_FN_DEBUG("%d", id);
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return id;
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}
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internal void
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system_acquire_global_frame_mutex(Thread_Context* tctx){
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LINUX_FN_DEBUG();
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if (tctx->kind == ThreadKind_AsyncTasks){
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system_mutex_acquire(linuxvars.global_frame_mutex);
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}
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}
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internal void
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system_release_global_frame_mutex(Thread_Context* tctx){
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LINUX_FN_DEBUG();
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if (tctx->kind == ThreadKind_AsyncTasks){
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system_mutex_release(linuxvars.global_frame_mutex);
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}
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}
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internal System_Mutex
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system_mutex_make(void){
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System_Mutex result = {};
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Linux_Object* object = linux_alloc_object(LinuxObjectKind_Mutex);
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pthread_mutex_init(&object->mutex, NULL);
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*(Linux_Object**)&result = object;
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LINUX_FN_DEBUG("%p", object);
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return result;
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}
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internal void
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system_mutex_acquire(System_Mutex mutex){
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Linux_Object* object = *(Linux_Object**)&mutex;
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LINUX_FN_DEBUG("%p", object);
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Assert(object->kind == LinuxObjectKind_Mutex);
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pthread_mutex_lock(&object->mutex);
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}
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internal void
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system_mutex_release(System_Mutex mutex){
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Linux_Object* object = *(Linux_Object**)&mutex;
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LINUX_FN_DEBUG("%p", object);
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Assert(object->kind == LinuxObjectKind_Mutex);
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pthread_mutex_unlock(&object->mutex);
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}
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internal void
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system_mutex_free(System_Mutex mutex){
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Linux_Object* object = *(Linux_Object**)&mutex;
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LINUX_FN_DEBUG("%p", object);
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Assert(object->kind == LinuxObjectKind_Mutex);
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pthread_mutex_destroy(&object->mutex);
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linux_free_object(object);
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}
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internal System_Condition_Variable
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system_condition_variable_make(void){
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System_Condition_Variable result = {};
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Linux_Object* object = linux_alloc_object(LinuxObjectKind_ConditionVariable);
|
|
LINUX_FN_DEBUG("%p", object);
|
|
pthread_cond_init(&object->condition_variable, NULL);
|
|
*(Linux_Object**)&result = object;
|
|
return result;
|
|
}
|
|
|
|
internal void
|
|
system_condition_variable_wait(System_Condition_Variable cv, System_Mutex mutex){
|
|
Linux_Object* cv_object = *(Linux_Object**)&cv;
|
|
Linux_Object* mutex_object = *(Linux_Object**)&mutex;
|
|
LINUX_FN_DEBUG("%p / %p", cv_object, mutex_object);
|
|
Assert(cv_object->kind == LinuxObjectKind_ConditionVariable);
|
|
Assert(mutex_object->kind == LinuxObjectKind_Mutex);
|
|
pthread_cond_wait(&cv_object->condition_variable, &mutex_object->mutex);
|
|
}
|
|
|
|
internal void
|
|
system_condition_variable_signal(System_Condition_Variable cv){
|
|
Linux_Object* object = *(Linux_Object**)&cv;
|
|
LINUX_FN_DEBUG("%p", object);
|
|
Assert(object->kind == LinuxObjectKind_ConditionVariable);
|
|
pthread_cond_signal(&object->condition_variable);
|
|
}
|
|
|
|
internal void
|
|
system_condition_variable_free(System_Condition_Variable cv){
|
|
Linux_Object* object = *(Linux_Object**)&cv;
|
|
LINUX_FN_DEBUG("%p", object);
|
|
Assert(object->kind == LinuxObjectKind_ConditionVariable);
|
|
pthread_cond_destroy(&object->condition_variable);
|
|
linux_free_object(object);
|
|
}
|
|
|
|
internal void*
|
|
system_memory_allocate(u64 size, String_Const_u8 location){
|
|
|
|
void* result = mmap(
|
|
NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
|
|
// TODO(andrew): Allocation tracking?
|
|
LINUX_FN_DEBUG("%" PRIu64 ", %.*s %p", size, (int)location.size, location.str, result);
|
|
return result;
|
|
}
|
|
|
|
internal b32
|
|
system_memory_set_protection(void* ptr, u64 size, u32 flags){
|
|
LINUX_FN_DEBUG("%p / %ld / %d", ptr, size, flags);
|
|
int protect = 0;
|
|
MovFlag(flags, MemProtect_Read, protect, PROT_READ);
|
|
MovFlag(flags, MemProtect_Write, protect, PROT_WRITE);
|
|
MovFlag(flags, MemProtect_Execute, protect, PROT_EXEC);
|
|
int result = mprotect(ptr, size, protect);
|
|
return result == 0;
|
|
}
|
|
|
|
internal void
|
|
system_memory_free(void* ptr, u64 size){
|
|
LINUX_FN_DEBUG("%p / %ld", ptr, size);
|
|
munmap(ptr, size);
|
|
}
|
|
|
|
internal Memory_Annotation
|
|
system_memory_annotation(Arena* arena){
|
|
LINUX_FN_DEBUG();
|
|
// TODO;
|
|
}
|
|
|
|
internal void
|
|
system_show_mouse_cursor(i32 show){
|
|
LINUX_FN_DEBUG("%d", show);
|
|
|
|
linuxvars.cursor_show = show;
|
|
|
|
XDefineCursor(
|
|
linuxvars.dpy,
|
|
linuxvars.win,
|
|
show ? None : linuxvars.hidden_cursor);
|
|
}
|
|
|
|
internal b32
|
|
system_set_fullscreen(b32 full_screen){
|
|
LINUX_FN_DEBUG("%d", full_screen);
|
|
|
|
linuxvars.should_be_full_screen = full_screen;
|
|
return true;
|
|
}
|
|
|
|
internal b32
|
|
system_is_fullscreen(void){
|
|
LINUX_FN_DEBUG();
|
|
return linuxvars.is_full_screen;
|
|
}
|
|
|
|
internal Input_Modifier_Set
|
|
system_get_keyboard_modifiers(Arena* arena){
|
|
LINUX_FN_DEBUG();
|
|
// TODO:
|
|
//return(copy_modifier_set(arena, &linuxvars.input_chunk.pers.modifiers));
|
|
}
|