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mdbx: add mdbx_env_delete().

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Resolves https://github.com/erthink/libmdbx/issues/119
Related to https://github.com/Kerollmops/heed/issues/58

Change-Id: Iec5bf5978e45bb6843f3ed8dd06ea4d34f2895cb
This commit is contained in:
Leonid Yuriev
2020-10-09 22:43:14 +03:00
parent cd0c727880
commit 0627d902dd
7 changed files with 162 additions and 1 deletions
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75
src/core.c
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@@ -10467,6 +10467,81 @@ __cold static int mdbx_handle_env_pathname(MDBX_handle_env_pathname *result,
return MDBX_SUCCESS;
}
__cold int mdbx_env_delete(const char *pathname, MDBX_env_delete_mode_t mode) {
switch (mode) {
default:
return MDBX_EINVAL;
case MDBX_ENV_JUST_DELETE:
case MDBX_ENV_ENSURE_UNUSED:
case MDBX_ENV_WAIT_FOR_UNUSED:
break;
}
MDBX_env dummy_env;
memset(&dummy_env, 0, sizeof(dummy_env));
dummy_env.me_flags =
(mode == MDBX_ENV_ENSURE_UNUSED) ? MDBX_EXCLUSIVE : MDBX_ENV_DEFAULTS;
dummy_env.me_psize = dummy_env.me_os_psize = (unsigned)mdbx_syspagesize();
dummy_env.me_path = (char *)pathname;
MDBX_handle_env_pathname env_pathname;
STATIC_ASSERT(sizeof(dummy_env.me_flags) == sizeof(MDBX_env_flags_t));
int rc = MDBX_RESULT_TRUE,
err = mdbx_handle_env_pathname(
&env_pathname, pathname, (MDBX_env_flags_t *)&dummy_env.me_flags, 0);
if (likely(err == MDBX_SUCCESS)) {
mdbx_filehandle_t clk_handle = INVALID_HANDLE_VALUE,
dxb_handle = INVALID_HANDLE_VALUE;
if (mode > MDBX_ENV_JUST_DELETE) {
err = mdbx_openfile(MDBX_OPEN_DELETE, &dummy_env, env_pathname.dxb,
&dxb_handle, 0);
err = (err == MDBX_ENOFILE) ? MDBX_SUCCESS : err;
if (err == MDBX_SUCCESS) {
err = mdbx_openfile(MDBX_OPEN_DELETE, &dummy_env, env_pathname.lck,
&clk_handle, 0);
err = (err == MDBX_ENOFILE) ? MDBX_SUCCESS : err;
}
if (err == MDBX_SUCCESS && clk_handle != INVALID_HANDLE_VALUE)
err = mdbx_lockfile(clk_handle, mode == MDBX_ENV_WAIT_FOR_UNUSED);
if (err == MDBX_SUCCESS && dxb_handle != INVALID_HANDLE_VALUE)
err = mdbx_lockfile(dxb_handle, mode == MDBX_ENV_WAIT_FOR_UNUSED);
}
if (err == MDBX_SUCCESS) {
err = mdbx_removefile(env_pathname.dxb);
if (err == MDBX_SUCCESS)
rc = MDBX_SUCCESS;
else if (err == MDBX_ENOFILE)
err = MDBX_SUCCESS;
}
if (err == MDBX_SUCCESS) {
err = mdbx_removefile(env_pathname.lck);
if (err == MDBX_SUCCESS)
rc = MDBX_SUCCESS;
else if (err == MDBX_ENOFILE)
err = MDBX_SUCCESS;
}
if (err == MDBX_SUCCESS && !(dummy_env.me_flags & MDBX_NOSUBDIR)) {
err = mdbx_removedirectory(pathname);
if (err == MDBX_SUCCESS)
rc = MDBX_SUCCESS;
else if (err == MDBX_ENOFILE)
err = MDBX_SUCCESS;
}
if (dxb_handle != INVALID_HANDLE_VALUE)
mdbx_closefile(dxb_handle);
if (clk_handle != INVALID_HANDLE_VALUE)
mdbx_closefile(clk_handle);
} else if (err == MDBX_ENOFILE)
err = MDBX_SUCCESS;
mdbx_free(env_pathname.buffer_for_free);
return (err == MDBX_SUCCESS) ? rc : err;
}
__cold int mdbx_env_open(MDBX_env *env, const char *pathname,
MDBX_env_flags_t flags, mdbx_mode_t mode) {
int rc = check_env(env);