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Cleanup shm cleanup code.

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This commit is contained in:
Alexei Svitkine 2012-09-02 11:29:16 -04:00
parent 80c2e5349f
commit 407edc8bfd
1 changed files with 22 additions and 35 deletions
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57
SheepShaver/src/Unix/main_unix.cpp
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@ -202,7 +202,6 @@ X11_LOCK_TYPE x_display_lock = X11_LOCK_INIT; // X11 display lock
static int zero_fd = 0; // FD of /dev/zero
static bool lm_area_mapped = false; // Flag: Low Memory area mmap()ped
static int kernel_area = -1; // SHM ID of Kernel Data area
static bool rom_area_mapped = false; // Flag: Mac ROM mmap()ped
static bool ram_area_mapped = false; // Flag: Mac RAM mmap()ped
static bool dr_cache_area_mapped = false; // Flag: Mac DR Cache mmap()ped
@ -247,7 +246,7 @@ uintptr SheepMem::data; // Top of SheepShaver data (stack like storage)
// Prototypes
static bool kernel_data_init(void);
static void kernel_data_exit(void);
static bool shm_map_address(int kernel_area, uint32 addr);
static void Quit(void);
static void *emul_func(void *arg);
static void *nvram_func(void *arg);
@ -1158,51 +1157,39 @@ static void Quit(void)
static bool kernel_data_init(void)
{
char str[256];
void *kernel_addr1 = NULL;
void *kernel_addr2 = NULL;
int error_string = STR_KD_SHMGET_ERR;
uint32 kernel_area_size = (KERNEL_AREA_SIZE + SHMLBA - 1) & -SHMLBA;
int kernel_area = shmget(IPC_PRIVATE, kernel_area_size, 0600);
if (kernel_area != -1) {
bool mapped =
shm_map_address(kernel_area, KERNEL_DATA_BASE & -SHMLBA) &&
shm_map_address(kernel_area, KERNEL_DATA2_BASE & -SHMLBA);
kernel_area = shmget(IPC_PRIVATE, kernel_area_size, 0600);
if (kernel_area == -1) {
sprintf(str, GetString(STR_KD_SHMGET_ERR), strerror(errno));
goto fail_shmget;
}
kernel_addr1 = Mac2HostAddr(KERNEL_DATA_BASE & -SHMLBA);
if (shmat(kernel_area, kernel_addr1, 0) != kernel_addr1) {
sprintf(str, GetString(STR_KD_SHMAT_ERR), strerror(errno));
goto fail_shmat1;
}
kernel_addr2 = Mac2HostAddr(KERNEL_DATA2_BASE & -SHMLBA);
if (shmat(kernel_area, kernel_addr2, 0) != kernel_addr2) {
sprintf(str, GetString(STR_KD2_SHMAT_ERR), strerror(errno));
goto fail_shmat2;
}
atexit(kernel_data_exit);
return true;
// Mark the shared memory segment for removal. This is safe to do
// because the deletion is not performed while the memory is still
// mapped and so will only be done once the process exits.
shmctl(kernel_area, IPC_RMID, NULL);
if (mapped)
return true;
fail_shmat2:
shmdt(kernel_addr1);
fail_shmat1:
shmctl(kernel_area, IPC_RMID, NULL);
fail_shmget:
error_string = STR_KD_SHMAT_ERR;
}
char str[256];
sprintf(str, GetString(error_string), strerror(errno));
ErrorAlert(str);
return false;
}
/*
* Deallocate Kernel Data segments
* Maps the memory identified by kernel_area at the specified addr
*/
static void kernel_data_exit(void)
static bool shm_map_address(int kernel_area, uint32 addr)
{
if (kernel_area >= 0) {
shmdt(Mac2HostAddr(KERNEL_DATA_BASE & -SHMLBA));
shmdt(Mac2HostAddr(KERNEL_DATA2_BASE & -SHMLBA));
shmctl(kernel_area, IPC_RMID, NULL);
kernel_area = -1;
}
void *kernel_addr = Mac2HostAddr(addr);
return shmat(kernel_area, kernel_addr, 0) == kernel_addr;
}